GE Energy Digital Energy Zenith ZTE/ZBTE Series Transfer Switches 40-4000 Amps Operation & Maintenance Manual Authorized Service For GE parts and service call: 1 + 800 637-1738, option #3 or 1 + 773 299-6600 Table of Contents Introduction, Safety & Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Installation Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Inspection Prior to Initial Energization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Initial Testing & Energization of the Switch Manual Testing of Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical Testing of the Switch (Source 1 = utility, Source 2 = generator) . . . . . . . . . . . . . . . . . . . 5 The Control Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 The MX350 Controller The MX350 Graphical Display & Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Switch Exerciser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Controller Power Supply (UTA – Universal Transformer Assembly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Sequence of Operation for Bypass/Isolation Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Troubleshooting & Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Maintenance & Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Information subject to change without notice. Please verify all details with GE. Introduction, Safety & Storage GE transfer switches are used to provide a continuous source of power for mission, process and healthcare critical loads by automatically transferring from a preferred source of power Source 1 (or Normal Source) to a non-preferred alternate Source 2 (or Emergency) power source (typically a generator) in the event that Source 1 operational parameters fall outside preset limits. Voltage and current sensing and system controls are performed via a state-of-the-art microcontroller located on the cabinet door. It is designed to give highly accurate control of the transfer switch system. All GE transfer switches are designed for use on emergency or standby systems and are rated for total system or motor loads. Transfer switches are UL listed under Standard 1008 and CSA certified under Standard C22.2 No. 178. NOTE A protective device such as a molded case circuit breaker or fused disconnect switch MUST be installed on both sources of incoming power for circuit protection and as a disconnect device. All references made within this manual about the terms “Source 1”, “S1” or “Preferred Source” relate to a “Normal” power source (typically from a utility source). References made to “Source 2”, “S2”, “Non-preferred Source” or “Alternate Source” relate to an Emergency Source (many times a generator). The safe operation of your switch at all times is GE’s focus. It must be recognized that hazardous voltages and currents can exist during normal operation and any maintenance on the transfer switch must be performed utilizing appropriate safety measures. Installation, Table 1 Storage and Operating Ambient Temperatures Storage Temperature -30°C to +75°C (-22°F to +167°F) Operating Temperature (Ambient) 40-400 AMP (molded shell) -20°C to +65°C (-4°F to +149°F) adjustment, maintenance or removal of the switch must only be carried out by qualified personnel with all power to the switch turned off. It is recommended that only qualified electricians be allowed to install or provide maintenance on the switch. Regarding the switch itself, proper storage, installation, operation and maintenance will help increase its operational life. Upon initial receipt of the transfer switch, inspect for any damage. This includes damage to the enclosure, power panel, control panel and wiring harnesses. If any damage is found or suspected, file a claim as soon as possible with the carrier and notify the nearest GE representative, or call 1 + 800 637-1738 or 1 + 773 299-6600. Prior to installation store the transfer switch in a clean dry location, protected from dirt and water. Provide ample air circulation and heat, if necessary, to prevent condensation. See Table 1 for recommended storage and ambient operating temperatures. ! DANGER HAZARDOUS VOLTAGE CAN CAUSE SEVERE INJURY OR DEATH Turn OFF all power before installation, adjustment or removal of transfer switch or any of its components. ! CAUTION Due to hazardous voltages and currents, GE recommends that a GE Certified technician or a qualified electrician perform the installation and maintenance of the switch. Figure 1 Method of Moving Transfer Switch Humidity 5% to 95% (non-condensing) 40-4000 AMP (all other frame and panel types) -20°C to +60°C (-4°F to +140°F) NOTE: When lifting the switch using a spreader bar, height H must be equal to half of distance D. Zenith ZTE /ZBTE Series Operation & Maintenance Manual Page 1 91R-1000 Inspection Prior to Initial Energization Installation Prior to energizing the transfer switch, perform the following: When preparing to install the transfer switch, review the documentation included with the unit. Each GE transfer switch is factory wired and tested. A complete documentation package is furnished with each switch, providing descriptions and schematics for the following: a. Standard and non-standard control interface signals and options. b. Sequence of operations. c. Standard indicators, pushbuttons and annunciators. d. Controller failure and return settings and time delays. e. Description of the programmable engine exerciser. f. Standard programmable control of switch operation. g. User-configurable input and output. h. System schematics: 1. Overall switch system. 2. Universal transformer assembly (UTA) power supply. 3. Transfer switch device layout. 4. Transfer switch power panel layout. 5. Interconnect plugs. 6. Customer connection wiring. Mounting Adequate lifting means must be used to mount the transfer switch into place. The recommended method for moving the ATS using lifting eyes, where supplied, and a spreader bar is illustrated in Figure 1. Enough room should be allowed to open the cabinet door(s) fully for inspection and servicing of the switch per NEC and local codes. ! CAUTION Before drilling conduit entry holes or any accessory mounting holes, cover and protect the switch and control panel to prevent dirt and metal fragments from entering the mechanical and electrical components of the switch. 1. 2. 3. With a vacuum, remove any debris collected on the switch during shipment or installation. Check engine start connections. The engine-start terminals are located on terminal block positions 1 through 3 (see Figures 2 and 3). The E contact provides the engine start signal from the automatic transfer switch controller to the genset. The terminal block has two sets of A3 (Source 2 position) normally open contacts (NO) and two sets of A4 (Source 1 position) NO contacts. Verify the correct connection of all control wires. NOTE All control wires (18-12 AWG) must be torqued to 19 in/lbs (1.6 lb-ft) (2.2 N-m) 4. 5. 6. Check settings of all timers and adjust as necessary. Adjust any optional accessories as required. Verify that all Source 1, Source 2 and Load cables are correctly connected to the clearly marked terminals on the unit. 7. Verify from Table 2 the number and sizes of cable lugs, which are supplied as standard per the switch amperage rating. Most transfer switches are supplied with UL listed solderless screw-type terminals as standard for the Source 1, Source 2 and Load power connections. 8. Verify equipment ground cable(s) are installed per NEC and/or local codes. 9. Verify that all cable lug connections are tightened in accordance with torque values in Table 3. 10. Remove surface oxides from cables by cleaning with a wire brush. 11. Make sure that all covers and barriers are installed and properly fastened. Failure to do so may result in damage and malfunction of the switch and void the warranty. NOTE Power panels ship from GE connected to Source 1. Table 2 Power Connections: Screw Type Terminals for External Power Connections Switch Size (Amps) Neutral Bar (When Required) Range of Wire Sizes No. of Cables per lug Range of Wire Sizes 40 1 #8 AWG to 1/0 3 #8 AWG to 1/0 80 1 #8 AWG to 1/0 3 #8 AWG to 1/0 100 1 #8 AWG to 1/0 3 #8 AWG to 1/0 150 1 #8 AWG to 3/0 3 #8 AWG to 300 MCM 225 1 #6 AWG to 250 MCM 3 #6 AWG to 300 MCM 260, 400 1 #4 AWG to 600 MCM 3 #4 AWG to 300 MCM 600 2 #2 AWG to 600 MCM 8 #2 AWG to 600 MCM 800, 1000, 1200 4 #2 AWG to 600 MCM 12 #2 AWG to 600 MCM 1600, 2000, 3000, 4000 91R-1000 Source 1, Source 2 & Load Terminals Cable Per Pole Page 2 Line, Load and Neutral terminals are located in the rear of switch and arranged with bare bus bar Zenith ZTE /ZBTE Series Operation & Maintenance Manual Table 3 Tightening Torque for Lugs Socket Size Across Flats in 1/8 5/32 3/16 7/32 1/4 5/16 3/8 1/2 9/16 mm 3 4 5 5.5 6 8 10 13 14 Torque lb-in 45 100 120 150 200 275 375 500 600 lb-ft 4 8 10 12 17 23 31 42 50 N-m 5 11 14 17 23 31 42 56 68 Figure 2 Typical Switch Component Arrangement Inside Enclosure 1200-1600A Bypass Shown Below Current Transformer (CT) Block Load Source 2 Bypass Isolation ATS Power Panel Source 1 Backside of MX350 Graphical Control Panel Terminal Block (TB) (Engine start contact terminals, source 1 and 2 position contacts) MX350 Modular Controller (CPU, power supply, sensing CT card, I/O cards, etc.) Universal Transformer Assembly (UTA) Power Supply Input Relay (typ.) Output Relay (typ.) Disconnect Switch (DS) ATS Power Panel Zenith ZTE /ZBTE Series Operation & Maintenance Manual Page 3 91R-1000 Figure 3 Representative Schematic of Terminal Board, Output Strip and Input Strip Refer to Electrical Schematic Drawing for additional details Bypass ATS Non-Bypass ATS GE GE OTHERS OTHERS TB TB AUX A4-2 AUX A4-2 A4-2 NO C A4-2 NO C CA4-2 A4-1 A4-1 (2) NORMALLY OPEN CONTACTS HELD CLOSED IN SOURCE 1 POSITION FOR CUSTOMER USE. A4-1 NO C CA4-1 (2) NORMALLY OPEN CONTACTS, CLOSED IN SOURCE 2 POSITION FOR CUSTOMER USE. CA3-2 A3-1 (2) NORMALLY OPEN CONTACTS. CLOSED IN SOURCE 2 POSITION. FOR CUSTOMER USE. NO CA3-1 A3-1 C NO CA3-1 A3-1 AB4-5 NO C A3-2 NO C A3-2 A3-1 NO A3-2 CA3-2 C A4-1 C CA4-1 A3-2 (2) NORMALLY OPEN CONTACTS, HELD CLOSED IN SOURCE 1 POSITION FOR CUSTOMER USE. SEE NOTE 1 CA4-2 101 C CONTACT CLOSED WHEN BYPASS IS IN SOURCE 1 POSITION. FOR CUSTOMER USE. CONTACT CLOSED WHEN BYPASS IS IN SOURCE 2 POSITION. FOR CUSTOMER USE. NO 100 E11 8 9 K CARD E CONTACT E12 E13 8 AB3-6 99 NO C ENGINE START CONTACT FOR CUSTOMER USE 98 7 ENG. START PA3 8 TP1 E11 E12 E13 8 GE ZENITH CONTROLS E CONTACT 9 K CARD ENGINE START CONTACT FOR CUSTOMER USE 7 GE ZENITH CONTROLS OTHERS OTHERS J7 1 2 A1 + A2 OUT1 1-3 A1 OUT2 2-1 TO L-CARD SLOT “G” ON MX350 CONTROLLER A1 G1 G2 G3 G4 G5 G6 A2 OUT3 3-1 11 3-2 12 14 A2 SHUNT TRIP EMERG. BKR. STATUS OUTPUT CONTACT FOR CUSTOMER USE 11 4-2 12 14 OUT5 OUTPUT-4 11 5-2 12 14 - A1 IN2 OUTPUT-5 CONFIGURABLE OUTPUT CONTACTS FOR CUSTOMER USE 5-3 J6 A1 G7 G8 G9 G10 G11 G12 G13 G14 A2 A1 IN3 IN4 A2 11 12 14 IN5 11 12 14 IN6 A2 A1 11 12 14 A2 A1 11 12 14 A2 L7 L8 L9 L10 L11 L12 L13 L14 11 12 14 + A1 FACTORY USED (FOR ALARM) 5-1 A1 2 802 4-3 A2 1 IN1 A2 A2 4-1 OUT4 J5 (-) 2-2 3-3 A1 800 802 11 12 14 2-3 J8 LOAD SHED STATUS OUTPUT CONTACT FOR CUSTOMER USE 1-2 12 14 - A2 L1 L2 L3 L4 L5 L6 A1 1-1 11 TO L-CARD SLOT “G” ON MX350 CONTROLLER 800 802 IN7 11 7 NO 9 NO C C NO C 11 NO C 12 NO C 13 NO C COM COM 11 COM (SEE NOTE 4) R15 (SUPPLIED BY OTHERS) 10 12 14 12 14 NOTE 3) Q2 (SEE (SUPPLIED BY OTHERS) 8 25ZA CONFIGURABLE INPUTS OPTION PACKAGE FOR CUSTOMER USE DS (SEE NOTE 8) G INPUT STRIP G OUTPUT STRIP NOTES 1. ATS SHOWN IN SOURCE-1 POSITION WITH NO POWER AVAILABLE. 2. COMPONENTS DRAWN IN DASHED LINES ARE OPTION PACKAGE AND CUSTOMER CONNECTIONS OF THE TRANSFER SWITCH. 3. Q2 (TEST WITH LOAD) IS PROVIDED AS STANDARD (PRE-CONFIGURED) FEATURE. 4. R15 (LOAD SHED) IS PROVIDED AS AN OPTION (PRE-CONFIGURED) FEATURE. 5. UNLESS OTHERWISE SPECIFIED ALL CUSTOMER CONNECTION WIRES TO BE #14 AWG., 600V. 6. ENGINE START CONTACT IS RATED 10 AMPS AT 28VDC/120VAC. 7. OUTPUT STRIP CONTACTS ARE RATED 10 AMPS AT 30VDC/250VAC. 8. ENGINE START CONTACT MAY BE ON SEPARATE TERMINAL BLOCK FOR BYPASS SWITCHES. REFER TO ELECTRICAL SCHEMATIC FOR TERMINAL LOCATION. 91R-1000 Page 4 Zenith ZTE /ZBTE Series Operation & Maintenance Manual Initial Testing and Energization of the Switch Electrical Testing of the Switch (Source 1 = utility, Source 2 = generator) To verify the electrical system and proper automatic operation of the switch, perform the following steps: ! CAUTION Due to hazardous voltages and currents, GE recommends that a GE Certified technician or a qualified electrician perform the installation and maintenance of the switch. ! WARNING All power sources must be disconnected before manual operation of the switch. CHECKING SOURCE 1 (PREFERRED SOURCE) 1. Check to make sure the switch is connected to Source 1 position. 2. Turn the Disconnect Switch (DS) to INHIBIT. This prevents the switch from transferring or sending a start signal to the Source 2 generator unintentionally. 3. Verify that the switch rating is the same as the system voltage from Source 1 supply power. The equipment rating nameplate on the transfer switch lists the voltage (see Figure 4). Manual Testing of Mechanism A manual operator handle is provided with the transfer switch for maintenance purposes only. Manual operation of the switch must be checked before it is operated electrically. All power sources must be disconnected before manual operation of the switch is attempted. Insert the handle and operate the transfer switch between the Source 1 and Source 2 positions. The transfer switch should operate smoothly without binding. After insuring the switch mechanically transfers adequately, return the switch to Source 1 position, remove the handle and return it to the holder provided. Before proceeding, refer to the information package supplied with the ATS. Read and understand the information on all accessories installed. Figure 4 Transfer Switch Equipment Rating Nameplate (Typical) AUTOMATIC TRANSFER SWITCH FOR USE IN EMERGENCY SYSTEMS Model Number: Z3003S1AA50XXXXXXX Serial Number: 1598248-2 BOM Number: ZB1SD20031-05A600X RATING Volts: 480 Amps: 2000 Hz: 60 Phase: 03 Zenith ZTE /ZBTE Series Operation & Maintenance Manual LISTED 382H E23911 ! CAUTION Energizing a transfer switch with dissimilar system voltage from that which the ATS is rated may cause equipment damage. 4. 5. Close the Source 1 input circuit breaker. Confirm that the MX350 controller is sensing Source 1 voltage. The S1 LED should be illuminated. Electrical parameters (including phase rotation) can be viewed on the MX350 Graphical Control Panel on the \Value\Summary and \Diag\Phasor screens. Verify that the system voltage is correct for the rating of the switch. CHECKING SOURCE 2 (NON-PREFERRED OR ALTERNATE SOURCE) 6. Close the Source 2 input circuit breaker. 7. Manually start Source 2 via controls on the generator itself. Note that with the DS in INHIBIT position, the generator cannot be started by the MX350 controller. 8. Confirm that the MX350 controller is sensing Source 2 voltage. The S2 LED should be illuminated. Electrical parameters (including phase rotation) can be viewed on the Graphical Control Panel on the \Value\Summary and \Diag\Phasor screens. 9. Verify that the phase rotation of Source 1 is the same as the phase rotation of Source 2. 10. Manually shut down the generator via controls on the generator itself. Page 5 91R-1000 CHECKING THE SWITCH’S ABILITY TO TRANSFER 11. Turn the DS to AUTO position. This allows the MX350 controller to send a start signal to the generator. 12. Perform a System Test. The options available are (a) Fast Test (test with load without time delays), (b) Xfer Load and (c) No Xfer (test without load, generator start only). The test(s) can be initiated by the green TEST button on the Graphical Control Panel. 13. After completing electrical tests, close and lock the enclosure, including all small quarter-turn locks on the enclosure door. The number of PCB-mounted input and output relay assemblies equals the number of “L cards” on the microcontroller, more formally termed “IO_L modules.” The assembly of output relays is GE part number 50P-3042. The input relay assembly is GE part number 50P-3041. If the microcontroller has one L card, then there will be one pair of GE Part Number 50P-3041 and 50P-3042 PCB combinations mounted on the DIN rail inside the enclosure. For two L cards, there will be two sets of input and output strips. The maximum combination is three pairs of I/O strips (that is, a total of six relay DIN rail mounted PCBs). Electrical testing of the switch is further discussed in the manual MX350 Automatic Transfer Control System (Publication Number 1601-9071-A1). The controller automatically recognizes the physical location of the input or output relays via an alpha-numeric identification system. The first set of output relays are named G1 through G5 while the input relays are identified as G7 through G13. If a second L card exists in the microcontroller, the second PCB-mounted assembly output relays are named H1 through H5; the outputs are H7 through H13. Similarly, a third IO_L module is related to inputs I1 through I5 and outputs I7 through I13 (see Table 4). NOTE A periodic test of the transfer switch under load conditions is recommended to insure proper operation. (See National Electric Code articles 700 and 701) ! CAUTION Certain accessories, per specific schematics, can inhibit automatic transfer. Engine Genset could start when engine control wires are attached. The Control Connections The ZTE and ZBTE lines of transfer switches are designed for maximum flexibility and ease of installation. As illustrated in Figure 2, the MX350 controller input/output and metering modules, graphical control panel and power supplies are mounted on the enclosure door. All terminal connections for the engine start, switch position contacts, input and output relays are typically just inside the cabinet on the right side for ease of accessibility. Configurable input and output relays are PCB board mounted on DIN rail in combinational arrays of 5 inputs and 7 outputs. A “Field Connection Diagram” (see the example in Figure 5) is affixed on the cover of the universal transformer assembly (UTA) power supply for easy reference. This diagram provides the factory-supplied terminal board connections as well as dry contact inputs and outputs identified by terminal number as defined in the MX350 controller. The terminal board and I/O connections are schematically shown in Figure 3. Close-up photographs of an input and output PCB with terminal connections are shown in Figures 6 and 7. 91R-1000 Page 6 Table 4 IO_L Module Connections Terminal G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 Terminal H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 Terminal I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 I13 I14 Type Output Output Output Output Output Common for outputs Input Input Input Input Input Input Input Common for inputs Terminals G7 and G8 are always used for DS and Q2 functions, respectively, and cannot be adjusted. Depending on the type of switch and features ordered, Terminals G1 through G5 as well as G9 through G13 may not be available for customer configuration. See electrical schematic. Zenith ZTE /ZBTE Series Operation & Maintenance Manual Figure 5 Example of Field Connection Diagram Notes: 1. See Field connection wiring diagram for additional wiring details. 2. Controller inputs and outputs are field reconfigurable. “Factory Settings: indicate configuration at time of shipment. 3. From MX350 Display, go to \HOME\INPUTS or \HOME\OUTPUTS to see current configuration. 4. Record user configuration in “Field Setting” area below. Bypass ATS Non-Bypass ATS Name Term # Description Name Term # TB Strip 15 Connected to Source 1 (NO) TB Strip 12 Connected to Source 1 (NO) 14 Connected to Source 1 (Common) 11 Connected to Source 1 (Common) 13 Connected to Source 1 (NO) 10 Connected to Source 1 (NO) 12 Connected to Source 1 (Common) 9 Connected to Source 1 (Common) 11 Connected to Source 2 (NO) 8 Connected to Source 2 (NO) 10 Connected to Source 2 (Common) 7 Connected to Source 2 (Common) 9 Connected to Source 2 (NO) 6 Connected to Source 2 (NO) 8 Connected to Source 2 (Common) 5 Connected to Source 2 (Common) 7 4 Bypass in Source 1 (NO) 6 3 Bypass in Source 1 (Common) 5 2 Bypass in Source 2 (NO) 4 1 Bypass in Source 2 (Common) Description 3 Engine Start – NC 2 Engine Start – Common 3 Engine Start – NC 1 Engine Start – NO 2 Engine Start – Common 1 Engine Start – NO Name Term # Factory Setting G Output Strip G 1 (NO/NC/ Load Shed from S2 (R15) Common) Field Setting Factory Use Only G 2 (NO/NC/ Alternative Source Fail to Start Common) G 3 (NO/NC/ S1 Failure Common) G 4 (NO/NC/ S2 Failure to Connect Common) G 5 (NO/NC/ Load Control 1 Common) G Input Strip G7 Disconnect Switch (DS) Factory Use Only G8 Test with Load (Q2) Factory Use Only G9 Load Shed from S2 (R15) Factory Use Only G 10 Bypass Xfer Time Delay to S1 G 11 G 12 Inhibit Xfer to S2 (Q3) Inhibit Xfer to S1 (Q7) G 13 Engine Start (SW1) Com +24VDC Zenith ZTE /ZBTE Series Operation & Maintenance Manual Factory Use Only Page 7 91R-1000 Figure 6 Output Strip and Connections (GE Part Number 50P-3042) Output 1 1 = NO 2 = NC 3 = common Output 2 4 = NO 5 = NC 6 = common Output 3 7 = NO 8 = NC 9 = common Output 4 10 = NO 11 = NC 12 = common Output 5 13 = NO 14 = NC 15 = common Figure 7 Input Strip and Connections (GE Part Number 50P-3041) Input 7 Position 1 Input 8 Position 2 Input 9 Position 3 Input 10 Position 4 Input 11 Position 5 Input 12 Position 6 Input 13 Position 7 Common Position 8 Common Position 9 Common Position 10 91R-1000 Page 8 Zenith ZTE /ZBTE Series Operation & Maintenance Manual The MX350 Controller The MX350 microcontroller is a modular control and monitoring system designed specifically for low-voltage transfer switch applications. The MX350 provides the following key benefits: • Flexible control and communication options to suit any low-voltage transfer switch application. • Small footprint. • Modular design, which reduces the number of spare components for maintenance and testing. • Integrated pushbuttons and LED indicators which reduce required external components and wiring • Multiple communication protocols which permit simple integration into monitoring and control systems. • A graphical control panel that provides local control and access to system information. Detailed technical information on the MX350 controller is described in the manual MX350 Automatic Transfer Control System (Publication Number 1601-9071-A1). The MX350 Graphical Display and Keypad The MX350 controller features a ¼ VGA color graphical display with status LEDs, an USB programming port and menu-driven soft keys (see Figure 8) as well as dedicated control and navigational keys. Each display page, in turn, consists of three components: (1) a header bar, (2) the selected page and (3) soft-key labels (Figure 8). The header bar displays the hierarchical path name, the date and time and the current password access level. The soft-key labels are indicated on the bottom line. Soft-keys are used for navigation, performing functions and for acknowledgement transactions. Soft-keys labels change to show relevant selections for the displayed screen. The color of each soft-key label indicates its functionality. Soft-keys are highlighted for the displayed page, unauthorized keys are “greyed-out”, and unused keys are not displayed. The control panel LEDs summarize the status of the transfer switch, including the following indications: • ALARM: indicates that there is a problem with the ATS or that a user configurable alarm condition is active. • TD DELAY: indicates that the controller is timing before taking the next control action. • XFER INHIBIT: indicates that the controller will not automatically transfer to the other source and that operator intervention is required to allow transfer. • S1 (Source 1) Available LED: indicates that S1 power is present and within user defined limits. • S2 (Source 2) Available LED: indicates that S2 power is present and within user defined limits. • S1 (Source 1) Status LED: indicates that the load is connected to S1 power. • S2 (Source 2) Status LED: indicates that the load is connected to S2 power. The MX350 controller page hierarchy is shown in Figure 9. Operation Setpoints and User-Configurable Inputs and Outputs Operation setpoints define the acceptable electrical and time limits for both Source 1 and Source 2. These setpoints define dropout and restore values for over and undervoltage, over and under frequency, as well as the associated time delays. Tables 7 and 8 provide typical parameter settings for operation setpoints and timers. Figure 8 MX350 Graphical Display Components Zenith ZTE /ZBTE Series Operation & Maintenance Manual Page 9 91R-1000 Figure 9 MX350 Graphical Display Page Hierarchy Values Summary Amps Phase A Volts Phase B Power Phase C Summary PQ Status V1 Harm Phase A V2 Harm Phase B I Harm Phase C Outputs Summary Phase A System V Inputs Phase B Flex V Outputs Phase C Message Reset Inputs Setpoints Diag Config ATS Operation S1 Setting CT-VT Control S2 Setting Inputs Alarms Security Timers Outputs Faults Comms Control System Virtual Events Stats Reset General Interlock Events Phasors Alarms Zenith About Waveform Report Datalog Waveform Datalog Exerciser Info Setup Test ExerCancel Main menu 91R-1000 Page 10 Level 1 Level 2 Level 3 Zenith ZTE /ZBTE Series Operation & Maintenance Manual Switch Exerciser The MX350 controller has a built-in exerciser that can be enabled and set up from the \Exerciser\Info screen. This feature allows the user to test the system periodically or to setup a schedule for operating the system periodically in order to minimize utility costs. From the \Exerciser\Info screen the operator can access all required setup parameters for scheduling exercises. It also indicates as to when the last exercise took place and when the next exercise will be performed. The \Home\Exerciser\Test page displays the MX350 system test choices, as shown in Figure 11. From the Test screen the user can perform the same operations as performed by the exerciser. Whereas exercises are performed automatically, a Test always has to be initiated by the user. Figure 11 System Test Choices on Home\Exerciser\Test Page The \Home\Exerciser\Setup page displays the MX350 Exerciser parameters as shown in Figure 10. Exercise type and schedule are user-defined here for starting time, duration of exercise and whether or not the switch is to transfer the load. The mode of operation of the exerciser function can be selected with a time base of 1 day, 1 week, 14 days, 28 days, or 365 days. With a time base of 365 days, up to 24 events can be scheduled. With all other time bases, the number of exercise events is limited to 7. Figure 10 Exerciser Values on Home\Exerciser\Setup Page For each exercising event, the operator enters a start time as well as a time of duration. In addition, the operator can select the type of exercise as ‘Genstart and Transfer’ or as ‘Genstart only’. When the ‘Gen Start only’ mode is selected, the controller will start the engine, but does not actually transfer the load. In this mode, the readiness for the engine generator set is tested. It does not test the functionality of the Automatic Transfer Switch itself. In the ‘Gen Start and Transfer’ mode, the controller starts the engine and actually transfers the load to the alternative source. This mode can be used to test the integrity of the emergency power system. It can also be used to setup a schedule for times of operation when the switch load will run on an alternative power supply. This could be done, e.g., to avoid demand charges from a utility company. If the operator chooses to abort an ongoing test, there is a ‘Test Cancel’ button on the \Exerciser\Info screen. This screen also contains a ‘Test’ button that will take the user directly to the Test screen. Zenith ZTE /ZBTE Series Operation & Maintenance Manual There are three types of tests: Fast Test, Xfer Load, and No Xfer. The screen also provides an END button to abort any of the three test types. To test the functionality of the switch the operator can use the Fast Test option. With this kind of test, the engine generator will start and the load will transfer without going through any time delays. In order to simulate a load transfer as if an outage was occurring, the operator can select the Xfer Load test. With this test type, the engine will start up and the load will transfer according the time delay of the W timer. When the test is ended (by depressing the END button), the switch will go through the U timer delay before actually transferring back to the utility. Controller power supply (UTA – universal transformer assembly) System line voltage is transformed to 170Vdc to power the MX350 controller and 24Vdc ungrounded to power relays via the universal transformer assembly (UTA). The power supply is termed “universal” because the same unit handles all line voltages from 120Vac through 600Vac via an internal six-position jumper array. Figure 12 shows the external connections points for the UTA. The UTA also features a 120Vac uninterruptible power supply input and 24Vdc input battery options. 120Vac and 24Vdc (ungrounded) must be supplied together from an uninterrupted power source. In addition, test terminals are included for transformer voltage monitoring (see Figure 13 for connection point definitions and Figure 14 for the UTA schematic). Page 11 91R-1000 Figure 12 Connection Points for Universal Transformer Assembly (UTA) Source 2 voltage input 24VDC Aux Input (ungrounded) (customer supplied) (not obligatory) (See Note 1) 120VAC Aux Input (customer supplied) (not obligatory) (See Note 1) UTA metal cover Source 1 voltage input Test points UTA PC board 24VDC output from UTA to I/O relays 170VDC output from UTA to MX350 controller Note 1: Both Aux inputs must be supplied from an uninterrupted power source. Supplying only one Aux input may result in malfunction. Figure 13 Connection Points on Test Plug for Universal Transformer Assembly (UTA) Plug position 20 19 18 17 16 15 14 13 12 11 TP1 TP3 TP5 TP7 TP9 Test point Plug position 10 9 8 7 6 5 4 3 2 1 Test point TP2 TP4 TP6 TP8 TP10 View looking into plug Plug position Test point Test Connection Points Value Measured 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 TP10 — TP8 — TP6 — TP4 — TP2 — — TP9 — TP7 — TP5 — TP3 — TP1 TP1-TP2 TP2-TP3 TP4-TP5 TP6-TP7 TP7-TP8 TP9-TP10 Line AC voltage input from Source 1 Voltage drop across R1 24 VAC to output from Source 1 to input/output relays Line AC voltage input from Source 2 Voltage drop across R2 24 VAC to output from Source 2 to input/output relays 91R-1000 Page 12 Zenith ZTE /ZBTE Series Operation & Maintenance Manual Figure 14 Universal Transformer Box Assembly (UTA) Schematic J1 REFER TO ELECTRICAL SCHEMATIC DWG. SHEET 4 V_A 20 Source 1 1 AC Voltage 3 21 MOV1 V_B J2 30 Source 2 1 AC Voltage 3 31 TP5 V_A 1 3 JP6 MOV2 V_B 120VAC TP1 TP2 120VAC TP1 TP3 0 TP2 TP3 J3 10 20 20 TO TP1 TO TP2 TO TP3 TO TP4 TO TP5 TO TP6 TO TP7 TO TP8 TO TP9 TO TP10 9 18 7 TEST POINTS FOR SERVICE TROUBLESHOOTING 16 5 14 3 12 1 T1 10 12 17VDC TP4 TP5 120VAC TP6 TP7 120VAC TP6 TP8 0 TP7 TP8 1 11 17VDC 7 9 6 7 JP5 D25 TP4 JP4 TP2 5 TP3 ~ R1 JP3 4 JP2 D1 D5 D2 D6 D3 D7 D4 D8 3 JP1 11 2 1 12 TP1 TP9 TP10 + - TP10 T2 7 9 6 7 D25 TP9 FROM CUSTOMER UPS (120VAC) OPTIONAL FOR KEEPING THE MX350 CPU ACTIVE WITH LOSS OF SOURCE 1 OR SOURCE 2 POWER (SEE NOTE 1) J6 D17 V_A D21 D18 1 D22 MOV3 3 V_B D19 D23 D20 D24 TP7 5 R5 TP8 R2 + - 4 ~ D9 D13 D10 D14 D12 D16 D4 D8 3 2 1 + - 11 12 TP6 J12 - 170- 2 TO MX350 CONTROLLER POWER SUPPLY (PS) R3 C2 MOV4 R4 C1 MOV5 + 170+ 4 J9 - 802 1 FROM TO MX350 CONTROLLER I/O’S + 800 FROM CUSTOMER BATTERY (24VDC) (UNGROUNDED) 2 D26 J4 + 1 2 OPTIONAL FOR KEEPING THE INPUT AND OUTPUT STRIPS ACTIVE WITH LOSS OF SOURCE 1 OR SOURCE 2 POWER (SEE NOTE 1) NOTE 1: MUST BE SUPPLIED TOGETHER FROM AN UNINTERRUPTED POWER SOURCE Zenith ZTE /ZBTE Series Operation & Maintenance Manual Page 13 91R-1000 Sequence of Operation Automatic transfer switches transition from one source to a second source in three different ways: standard (also referred to as open), delayed and closed transition. Delayed transition switches have an intermediary midpoint location where the switch is not connected to either source when transferring to the non-preferred source after a preferred source failure. For closed transition, both sources are connected momentarily. Timers are utilized to insure that sources are stable before transferring or to prevent a hurried, ultimately unnecessary transfer when the apparently failed source was actually not in a state of failure. When transferring with two good sources (either a retransfer back to Source 1 or a system test transfer), closed transition switches are momentarily connected to both sources for a period of less than 100 ms. The controller prevents transfer until Source 2 is in electrical synchronism with the utility. Sequence of Operation for Bypass/Isolation Transfer Switch An automatic transfer switch equipped with a bypass/ isolation switch provides the ability to withdraw the automatic transfer switch for testing and/or maintenance purposes without interrupting the served load. The bypass manual switch is the upper power panel while the automatic switch is housed in the lower panel (see Mimic Bus and Indicator Lights Schematic in Figure 15). Operation of the unit is quick and convenient, requiring only one operator and less than one minute to complete. Instructions are mounted on the front of each isolation switch door along with a mimic panel providing indication of power source availability and bypass/ATS switch positions. In the TEST position, the ATS is disconnected from the load (which is instead powered through the bypass panel). However, control power is available to the ATS to permit operational testing through the control panel of the transfer switch while removed from Source 1 and Source 2. In the ISOLATE position, the ATS is completely withdrawn and may be removed from the enclosure, if desired, for maintenance. After the isolation operation, if the bypass is closed into Source 1 and this source happens to fail, an auxiliary contact on the bypass control will automatically start the alternate generator source (Source 2). The manual handle of the bypass may then be operated to transfer the load to Source 2. Interlocks guard against inadvertent manual connection to an opposite source if the ATS is in the circuit. Also, the reconnection of the ATS is prevented via interlocks if the source positions don’t match. Comparative sequences of operation for bypass/isolation transfer switch as a function of rated amperage are shown in Figure 16. ! WARNING While the bypass switch is out of the AUTO position/mode, the ATS is INHIBITED from automatic operation. Make certain the ATS is left in automatic after completion of any service. Figure 15 Bypass/Isolation Transfer Switch Mimic Bus and Indicator Lights Schematic The manual bypass switch is normally open on both sources with the ATS feeding the system load. During operation, the bypass switch is closed, paralleling the ATS contacts which then allows withdrawal of the ATS to the TEST or ISOLATE position. Mechanical and electrical interlocks are included to prevent cross-sourcing or bypassing to a dead source. 91R-1000 Page 14 Zenith ZTE /ZBTE Series Operation & Maintenance Manual Zenith ZTE /ZBTE Series Operation & Maintenance Manual • Install the ATS onto the accuride assembly • Push the ATS in until the racking mechanism has fully engaged • Lock the ATS in the ISOLATE position by engaging the racking stop brackets • Turn DS to Inhibit • Manually position ATS into same source as Bypass Switch • Close Automatic Transfer Switch access panel • Rotate crank mechanism clockwise until ATS Test light is illuminated • Turn DS to Auto and use TS to electrically operate ATS • Turn DS to Inhibit • Rotate crank mechanism clockwise until ATS location pointer is aligned with Auto mark on location indicator. (ATS must be in same source as Bypass) • Turn DS to Auto and open Bypass with MBH • ATS is now fully automatic • Place ATS in slide mechanism • Unlock slide mechanism • Slide ATS over power panel latches & rotate latches to horizontal position • Turn Disconnect Switch (DS) to INHIBIT • Manually position ATS into same source as bypass switch • Reconnect multipin plugs & external connections to ATS • Rotate crank mechanism clockwise until ATS TEST light is illuminated (See Figure 15) • Turn Disconnect Switch (DS) to AUTO & use Test Switch (TS) to electrically operate ATS • Turn Disconnect Switch (DS) to INHIBIT • Rotate crank mechanism clockwise until ATS location pointer is aligned with AUTO mark on location indicator. (ATS must be in same source as bypass) • Turn DS to AUTO & open bypass with manual bypass handle (MBH) • ATS is now fully automatic • Place ATS into drawer slots (front rollers first) • Turn Disconnect Switch (DS) to INHIBIT • Manually position ATS into same source as bypass switch • Reconnect multipin plugs & external connections to ATS • Push ATS inward to engage carriage • Move ATS location handle (ALH) to TEST location (as indicated by light) • Turn Disconnect Switch (DS) to AUTO & use Test Switch (TS) to electrically operate ATS • Turn Disconnect Switch (DS) to INHIBIT • Move ATS location handle (ALH) to AUTO location • Turn DS to AUTO & open bypass with MBH • ATS is now fully automatic Page 15 • (1) Move manual bypass handle (MBH) downward to open the bypass power panel contacts, • (2) turn the bypass selector switch (BSS) to the opposite power source, and • (3) move the MBH upward to close into the selected power source • (1) Move manual bypass handle (MBH) downward to open the bypass power panel contacts, • (2) turn the bypass selector switch (BSS) to the opposite power source, and • (3) move the MBH upward to close into the selected power source Notes: • Disconnect Switch (DS) in INHIBIT prevents the electrical operation of the ATS. • Do not use excessive force on mechanical handles. • Figures depict bypass operations relative to Source 1. Sequences are the same for bypass operations relative to Source 2. • When ATS is in TEST or ISOLATE, the bypass switch operates as a manual transfer switch to either available source, which is indicated on the light panel. (See Figure 15) 7. To Operate the Bypass Switch When the ATS is in TEST or ISOLATE 6. To Reconnect ATS After Removal • Move the manual bypass handle (MBH) to the available power source • Roll cart back into cabinet • Slide four corner latches of ATS to outermost position • Turn DS to Inhibit • Manually position ATS into same source as Bypass Switch • Close Automatic Transfer Switch access panel • Rotate crank mechanism clockwise until ATS Test light is illuminated • Turn DS to Auto and use TS to electrically operate ATS • Turn DS to Inhibit • Rotate crank mechanism clockwise until ATS location pointer is aligned with Auto mark on location indicator. (ATS must be in same source as Bypass) • Turn DS to Auto and open Bypass with MBH • ATS is now fully automatic • Bypass and isolate per above instructions • Open Automatic Transfer Switch access panel • Disengage the racking stop brackets • Manually pull the ATS forward until it comes to rest at the end of accuride travel • ATS can now be removed from cabinet • Bypass per instruction #2 and isolate per #4 above • Disconnect multipin plugs & external connections to ATS • Rotate four (4) power panel latches to vertical position, slide ATS forward & lock mechanism in place • Remove ATS from cabinet • Bypass per instruction #2 and isolate per #4 above • Move ATS location handle (ALH) to RELEASE position • Disconnect multipin plugs • Lift ATS out of drawer 5. To Remove ATS • (1) Move manual bypass handle (MBH) downward to open the bypass power panel contacts, • (2) turn the bypass selector switch (BSS) to the opposite power source, and • (3) move the MBH upward to close into the selected power source • Bypass and isolate per above instructions • Open Automatic Transfer Switch access panel • Slide four corner latches of ATS to innermost position • ATS can now be removed from cabinet • Bypass per above instructions • Rotate crank mechanism counterclockwise until ATS ISOLATED light is illuminated • Bypass per instruction #2 above • Rotate crank mechanism counterclockwise until ATS ISOLATED light is illuminated (See Figure 15) • Bypass per instruction #2 above • Move ATS location handle (ALH) to ISOLATE position 4. To Isolate ATS • Bypass per above instructions • Rotate crank mechanism counterclockwise until ATS ISOLATED light is illuminated • Bypass per above instructions • Rotate crank mechanism counter-clockwise until ATS TEST light is illuminated • Turn DS to Auto • Test Switch (TS) on microprocessor controller will allow electrical operation of ATS • Bypass per above instructions • Rotate crank mechanism counter-clockwise until ATS TEST light is illuminated • Turn DS to Auto • Test Switch (TS) on microprocessor controller will allow electrical operation of ATS • Bypass per instruction #2 above • Move ATS location handle (ALH) to TEST location • Turn DS to AUTO • Test switch (TS) on bottom cabinet door will allow electrical operation of ATS 3. To Test ATS • Bypass per instruction #2 above • Rotate crank mechanism counter-clockwise until ATS TEST light is illuminated • Turn DS to AUTO • Test switch (TS) on bottom cabinet door will allow electrical operation of ATS • Turn DS to Inhibit • Open Bypass Isolation Access panel • Turn Bypass Selector Switch (BSS) to same power source as ATS • Position Manual Bypass Handle (MBH) upward 2. To Bypass ATS • Turn DS to Inhibit • Open Bypass Isolation Access panel • Turn Bypass Selector Switch (BSS) to same power source as ATS • Position Manual Bypass Handle (MBH) upward Horizontal 1600-3000A • Open bottom cabinet door • Open bottom cabinet door • Turn Disconnect Switch (DS) to INHIBIT • Turn Disconnect Switch (DS) to INHIBIT • Position manual bypass handle (MBH) • Turn Bypass Selector Switch (BSS) to to same power source at ATS same power source as ATS • Manually operated Bypass Switch contacts (BN/BE) are open • ATS is supplying load • Disconnect switch (DS) is in AUTO Horizontal 600-1200A • Manually operated Bypass Switch contacts (BN/BE) are open and the ATS is supplying the load • Disconnect Switch (DS) is in Auto • Manually operated Bypass Switch contacts (BN/BE) are open • ATS is supplying load • Disconnect switch (DS) is in AUTO Vertical 600-1200A • Manually operated Bypass Switch contacts (BN/BE) are open and the ATS is supplying the load • Disconnect Switch (DS) is in Auto 1. Configuration for Automatic Operation Vertical 100-400A • (1) Move manual bypass handle (MBH) downward to open the bypass power panel contacts, • (2) turn the bypass selector switch (BSS) to the opposite power source, and • (3) move the MBH upward to close into the selected power source • Roll ATS cart back into cabinet • Slide four (4) corner latches of ATS to outermost position • Turn Disconnect Switch (DS) to INHIBIT • Manually position ATS into same source as bypass switch • Reconnect multipin plugs & external connections to ATS • Rotate crank mechanism clockwise until ATS TEST light is illuminated (See Figure 15) • Turn Disconnect Switch (DS) to AUTO & use Test Switch (TS) to electrically operate ATS • Turn Disconnect Switch (DS) to INHIBIT • Rotate crank mechanism clockwise until ATS location pointer is aligned with AUTO mark on location indicator. (ATS must be in same source as bypass) • Turn DS to AUTO & open bypass with manual bypass handle (MBH) • ATS is now fully automatic • Bypass per instruction #2 and isolate per #4 above • Disconnect multipin plugs & external connections to ATS • Slide for (4) corner latches of ATS to innermost position • Remove ATS from cabinet • Bypass per instruction #2 above • Rotate crank mechanism counterclockwise until ATS ISOLATED light is illuminated (See Figure 15) • Bypass per instruction #2 above • Rotate crank mechanism counter-clockwise until ATS TEST light is illuminated • Turn DS to AUTO • Test switch (TS) on bottom cabinet door will allow electrical operation of ATS • Open bottom cabinet door • Turn Disconnect Switch (DS) to INHIBIT • Position manual bypass handle (MBH) upward • Manually operated Bypass Switch contacts (BN/BE) are open • ATS is supplying load • Disconnect switch (DS) is in AUTO Vertical 4000A SOURCE 1 LOAD SOURCE 2 BE BN SOURCE 1 LOAD SOURCE 2 BP IS OPEN WITH ATS IN SOURCE 1 BE BN BE BN SOURCE 1 LOAD SOURCE 2 BE BN SOURCE 1 LOAD SOURCE 2 FIG. 4 BP IN SOURCE 1 WITH ATS ISOLATED ATS FIG. 3 BP IN SOURCE 1 WITH ATS IN TEST (LOAD CONNECTIONS ARE OPEN) ATS FIG. 2 BP IN SOURCE 1 WITH ATS IN SOURCE 1 ATS FIG. 1 ATS Horizontal Switch Position Vertical Switch Position Figure 16 Sequence of Operation for Bypass/Isolation Switches 91R-1000 Troubleshooting & Diagnostics ! DANGER HAZARDOUS VOLTAGE CAN CAUSE SEVERE INJURY OR DEATH Turn OFF all power before installation, adjustment or removal of transfer switch or any of its components. The following troubleshooting guide may be used to recognize and determine basic faults. If you go through all of the suspected faults and still require assistance, call a GE technical representative. Table 5 Basic Troubleshooting Guide for Automatic Transfer Switches Symptom Possible Cause(s) Corrective Action Engine start wires not terminated properly Check engine start connections Generator is in OFF position Investigate why Engine Control Switch was turned off U timing cycle not complete Check U timer setting Engine start wires not terminated properly Check engine start connections Generator in MANUAL Place generator in AUTO Source 1 not within proper parameters Check Source 1 voltage, frequency values, and Source 1 circuit breaker Mechanical or electrical connections problem Check all connections to SCR modules, check DS for proper operation & wire connections, check limit switches for proper operation Remote active inhibit signal Check for remote inhibit signal Engine does not start Engine does not stop ATS will not transfer to Source 2 ATS will not transfer to Source 1 91R-1000 Page 16 Source 2 voltage or frequency not with acceptable Check engine start connections, generator breaker, parameters generator output & engine control switch Power supply connector unplugged Plug in connector W timing cycle not complete Check W timer setting Mechanical or electrical connections problem Check all connections to SCR modules, check DS for proper operation & wire connections, check limit switches for proper operation Remote inhibit active Check for remote inhibit signal DW timing cycle not complete Check DW timer setting Source 1 voltage or frequency not within acceptable parameters Check utility & utility breakers Power supply connector unplugged Plug in connector T timing cycle not complete Check T timer setting Zenith ZTE /ZBTE Series Operation & Maintenance Manual Maintenance and Testing ! CAUTION Due to hazardous voltages and currents, GE recommends that a GE Certified technician or a qualified electrician perform the installation and maintenance of the switch. A preventive maintenance program will insure high reliability and long life for the transfer switch. A preventive maintenance program should including the following: Inspection and Cleaning The switch should be inspected for any accumulation of dust, dirt or moisture and should be cleaned by vacuuming or wiping with a dry cloth or soft brush. Do not use a blower since debris may become lodged in the electrical and mechanical components of the switch and can potentially cause damage. Remove the transfer switch barriers and check the condition of the contacts. Any surface deposits must be removed with a clean cloth (do not use emery cloth or a file). Pitted or excessively worn contacts should be replaced. General inspection of the general mechanical integrity of the switch should be made to identify and correct loose, broken or badly worn parts. Servicing All worn or inoperative parts must be replaced using genuine GE recommended replacement parts. Contact GE Technical Services for replacement parts information. The operating mechanism of the transfer switch is lubricated with Lubriplate 105. The lubricant applied at the factory will provide adequate lubrication for the lifetime of the switch. Should debris contaminate the mechanism, clean and apply additional Lubriplate. GE can provide complete preventative maintenance services. For additional information contact GE Technical Services at 1 + 800 637-1738 or 1 + 773 299-6600. Electrical testing of the switch is discussed in the “Testing” section of this manual. A periodic test of the transfer switch under load conditions is recommended to insure proper operation. (See National Electric Code articles 700 and 701) Zenith ZTE /ZBTE Series Operation & Maintenance Manual Page 17 91R-1000 Extensive Customer Service and Support Supported by a worldwide network of factory-trained Authorized Service Centers, our Technical Service Representatives can provide you with field service, equipment parts and preventive maintenance. Because emergency power systems are required to operate under the most adverse circumstances, site personnel may be called upon at any time to make decisions regarding the operation of the system, therefore training of these personnel is critical to the future of any installation. GE offers a variety of training options including on-site classes for project personnel, factory instruction on your equipment prior to shipment and service schools covering transfer switches and switchgear systems. Product Overview When you purchase emergency power equipment, reliability and quality are a necessity. GE is committed to providing the highest level of quality demanded by the industry. Our complete product line will allow you to specify a total power management system while maintaining overall compatibility and the most comprehensive warranty in the industry. Commitment to the Customer All team members at GE are aware of the critical situations in which our products are called upon to perform. With that understanding comes an obligation beyond merely fulfilling an order or turning out a product. Serving that obligation is our mission at GE. GE’s team works with you from the first phone call through completed start-up. Then, working hand in hand with the consulting engineer, the contractor and the facility owner/operator, we’ll ensure that the system fulfills both current and future needs. “Commitment to our customer” has been GE’s driving force for more than 100 years in the power control industry. This same sense of purpose and responsibility will continue as we address future power control challenges. GE Energy – Digital Energy 830 W 40th Street, Chicago, IL 60609 USA 800 637 1738 www.gepowerquality.com Information subject to change without notice. Please verify all details with GE. 91R-1000 (11/10) © 2010 General Electric Company All Rights Reserved