INVITATION TO BID
ITB NO. 211212/JJF
RIDER 101 – ENGINEERING SPECIFICATIONS
HIGH CURRENT CIRCUIT BREAKER TEST SET
1. SCOPE AND APPLICATIONS
1.1
The High Current Circuit Breaker Test Set must be capable of performing long time,
short time and instantaneous tests on low-voltage, metal clad direct arcing AC circuit
breakers produced by manufacturers such as ABB, Federal Pacific, GE, Gould, ITE,
Siemens, Square D, Westinghouse and others. The high current test set will have a
microprocessor to control the test set as well as to perform measurements and collect
data.
1.2
The test set unit must be universal in application allowing for the testing of virtually
any low voltage, molded case or metal clad direct acting AC circuit breaker by
simulating overload and full fault conditions
1.3
The test set must have the capability of testing up to 7,500 amp breakers, either
manually through the main control panel or remotely through PC software – together
allowing numerous automated test modes.
1.4
The test set must be designed to allow for continuously variable output over the entire
testing range and must use a motorized vernier and programmable tap selector that
allow for both Auto-Jog and Current-Hold capabilities.
1.5
The test set PC software must be Microsoft Windows™ based with a CD tutorial. The
software shall provide a database and report capabilities for test duplication and
recall, report generation and current wave shape display. The test set equipment
must have port access connections for a laptop computer and printer to record and
generate customizable test reports.
1.6
The test set equipment must have the capability for configuration in a series that can
be used for substation maintenance and for primary injection testing on high voltage
circuit breakers and protective relays.
1.7
The test set equipment must have the capability for testing current transformers and
thermal or magnetic motor overload relays.
1.8
Bidder shall indicate per day cost of on-site training on the test set and indicate total
number of training days anticipated.
1.9
Successful bidder shall provide, at no additional charge, two (2) copies of its
equipment operation/maintenance manual with schematics and parts list.
2. STANDARDS
2.1
The equipment covered by these specifications shall be designed in accordance with
the latest NEMA, NEC, ISO and ANSI standards.
Page 1 of 4
INVITATION TO BID
ITB NO. 211212/JJF
2.2
The test set equipment shall be designed for high reliability and be combined with a
phase angle firing system to deliver precise and repeatable current pulses with
minimal distortion.
2.3
The test equipment shall be designed for wide ranging test versatility and exceptional
accuracy through automated hardware & an intelligent monitor/controller.
2.4
Should the bidder take exception to any part of this specification, it shall be stated in
the bid with item number referenced.
3. TECHNICAL SPECIFICATIONS & RATINGS
3.1
Rating: 100 kVA
3.2
Input Voltage: 208, 240 and 480 Volts AC; 400 Amp
3.3
Output:
3.3.1
Parallel Connection: 16V
3.3.1.1
3.3.2
Continuous 7500 A
30 min ON/30 min OFF
1 min ON/10 min OFF
15 sec ON/ 2 min OFF
Series Connection: 32V
30 min ON/30 min OFF
1 min ON/10 min OFF
1 sec ON/ 2 min OFF
10,000 A
15,000 A
75,000 A
5,000 A
7,500 A
37,500 A
3.4
Output Connections: Universal Bus to accept cables or a wide variety of stabs.
3.5
Timer: Digital timer to measure elapsed time 0-999.999 seconds in one (1)
millisecond increments. The timer must start automatically at the initiation of the test
and stop when the device under test operates (trips). The timer must be reset before
another test is started.
3.6
Metering: Ammeter 4½” ± 2% accuracy
0-500/1,000/5,000/10,000/25,000/50,000/100,000 A scales
Voltmeter 4½” ± 2% accuracy
0-3/15 VAC
3.7
Control Circuits:
3.7.1
Maintained - Current - Actuated
Test set used for most tests and is used for devices with no auxiliary control
contacts or single-pole breakers. The timer starts on “current actuation” and
stops on current interruption.
Page 2 of 4
INVITATION TO BID
ITB NO. 211212/JJF
3.7.2
Momentary
Test set is energized and supplies output current only as long as the manual
switch is depressed.
3.7.3
Maintained
Test set for devices with normally closed contacts. The timer starts when the
output is energized and stops when the contacts open.
4. CONSTRUCTION DESIGN & SAFETY CONTROL FEATURES
4.1
The unit must be ruggedly constructed in a heavy duty cabinet with attached casters.
4.2
The unit must have a digital AC voltmeter for monitoring input, output and external
voltage up to 600 V AC.
4.3
The unit must have a current meter accuracy of 0.8% of reading +0.3% of range.
4.4
The unit must include output leads, quadruple 4/0, 5 feet and have auxiliary contact
leads, 5 feet (1.5m).
4.5
The unit must have a main power circuit breaker with indicator lamp.
4.6
The unit must have a control power switch with indicator lamp and ‘Output On’
indicator.
4.7
The unit must have an ‘Interlock Open’ indicator.
4.8
The unit must have an ‘Emergency Off’ mushroom type button.
4.9
The unit must have built-in overload and short circuit protection.
4.10
The unit must include a heavy-duty coated canvas protective cover.
5. REQUIRED TESTING MODES AND FEATURES
5.1
NORMAL: In this mode, operator manually controls the operation of the test set.
5.2
JOG-TO-HOLD: In this mode, the test set jogs on the output at “Jog On Cycles” and
jogs off for “Jog Off Secs” and raises the output until the “Hold Amps” is reached.
5.3
JOG-TO-TRIP: In this mode, the test set jogs on the output at “Jog On Cycles” and
jogs off for “Jogs Off Secs” until the circuit breaker trips.
5.4
CURRENT HOLD: In this mode, the output is held to within one percent (1%) of the
“Hold Amps”.
Page 3 of 4
INVITATION TO BID
ITB NO. 211212/JJF
5.5
MEMORY: This mode is used for testing the sensitivity pickup of electronic controllers
(When the STOP button is pressed, the Current level is remembered).
5.6
Phase Angle Firing: This equipment feature must assure precisely repeatable current
pulses with minimal distortion and DC offset.
5.7
Waveform Display: This equipment feature must allow for viewing the current
waveform injected through the breaker so that the DC offset or contact bounce can
be seen. The phase angle firing should allow for the correction of the DC offset by
varying the firing phase-angle and also allow for customizable test reports of the data.
6. BID SUBMITTALS
6.1
Bidder shall submit as part of its bid, data sheets describing complete technical data
including features, performance, electrical characteristics, physical characteristics,
ratings, accessories and finishes.
6.2
Bidder shall submit quotation on Rider 102 – Pricing Schedule. Bidder may indicate
“Per Attached Quote # xxxxxxx” on Rider 102 and attach a quotation using the
bidder’s own form.
6.3
Bidder shall submit all requested descriptive literature and supplemental documents
per Submittal Checklist.
Page 4 of 4