SECTION 26 67 10 – SURGE PROTECTIVE DEVICES
PART 1: GENERAL
1.01 DESCRIPTION:
A. General provisions and other electrical systems are specified in other Sections of Division 26.
B. This Section covers surge protective devices (SPDs) for low-voltage, 600 V or less, electrical distribution equipment.
C. Commissioning is specified in Section 26 00 90, Commissioning. This Section includes responsibilities and obligations in support of the commissioning process specified therein.
1.02 QUALITY ASSURANCE:
A. Conform to the following:
1. IEEE C62.41.1-2002 (R2008).
2. IEEE C62.41.2-2002.
3. NFPA 70-2005.
4. UL 1283-2005.
5. UL 1449-2007.
B. SPDs shall have a 5 year warranty.
PART 2: PRODUCTS
2.01 SURGE PROTECTIVE DEVICES:
A. General:
1. UL 1449-2007 voltage protection rating (VPR) label shall be permanently affixed to the units.
2. Maximum continuous operating voltage (MCOV) shall be greater than 115% of the nominal system operating voltage.
3. Protection modes: for a wye-configured system, devices shall have directly connected suppression elements between line-neutral (L-N), line-ground (L-G), and neutral-ground (N-G). For a deltaconfigured system, devices shall have suppression elements between line-line (L-L) and line-ground
(L-G).
4. Nominal discharge current (in): SPDs applied to the distribution system shall have a 20 kA in rating regardless of their SPD type (including Types 1 and 2) or operating voltage.
5. UL 1449-2007 component voltage protection rating shall not exceed the following:
System Voltage
L-N; L-G; N-G
L-L
208Y/120
700 V
1200 V
480Y/277
1200 V
2000 V
6. Electrical noise filter: each unit shall include a high performance EMI/RFI noise rejection filter.
7. Internal connections: internal components shall be hardwired with connections utilizing low impedance conductors and compression fittings.
8. Overcurrent protection: each unit shall be provided with overcurrent protection to provide both thermal overload protection for small magnitude fault current conditions or temporary over voltage conditions as well as short circuit current protection for high magnitude fault conditions. Each MOV module or element shall be individually fused with 200000 RMS symmetrical AIC internal fuses.
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SECTION 26 67 10 – SURGE PROTECTIVE DEVICES
9. Monitoring and Diagnostics: a. SPDs shall be equipped with visible indication of proper connection and operation.
Indicator lights shall indicate which phase as well as which module is fully operable. b. SPDs shall be equipped with an audible alarm which shall activate when any one of the surge current modules has reached an end-of-life condition. An alarm on/off switch shall be provided to silence the alarm. The switches and alarm shall be located on the front cover of each enclosure. c. SPDs shall be equipped with contacts for remote annunciation of alarm or trouble. d. SPDs installed at service entrance locations or within switchboards shall be equipped with a transient event counter.
10.
2.02 SYSTEM APPLICATIONS:
A.
Each unit shall incorporate an integral test feature to verify the operational integrity of the unit's monitoring system.
SPD applications covered under this Section include distribution and branch circuit panelboard locations and switchboard assemblies.
B. SPDs shall be tested and demonstrate suitability for application within IEEE C62.41-1991 Category C, B, and
A environments.
C. Surge current capacity: the minimum surge current capacity that each unit is capable of withstanding shall be as shown in the following table:
IEEE
C62.41-1991
Location Category Application
Minimum Surge
Current
Per Phase
Minimum Surge
Current
Per Mode*
C Service entrance (switchboard) 250 kA 100 kA
B Distribution and power panelboards 150 kA 50 kA
A Branch circuit panelboards 100 kA 50 kA
*L-G, L-N and N-G (wye system); L-L, L-G (delta system).
D. SPD type: SPDs installed on the line side of the service entrance disconnect shall be Type 1. SPDs installed on the load side of the service entrance disconnect shall be Type 2.
E. Panelboard Requirements:
1. Units shall be designed for IEEE C62.41.1-2002 (R2008) and IEEE C62.41.2-2002 Category B environments.
F. Switchboard Requirements:
1. Service entrance and other switchboard SPD units shall be designed for IEEE C62.41.1-2002
(R2008) and IEEE C62.41.2-2002 Category C environments.
2. Provide a disconnect switch directly ahead of or integral to the suppressor assembly.
3. Monitoring diagnostic features such as indicator lights, trouble alarms, and surge counter shall be mounted on the front of the switchboard.
2.03 MANUFACTURER:
A. Eaton SPD, GE Tranquell, Siemens TPS, or Square D Surgelogic.
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SECTION 26 67 10 – SURGE PROTECTIVE DEVICES
PART 3: EXECUTION
3.01 INSTALLATION:
A. Install SPDs in accordance with manufacturer's written instructions.
B. Install SPDs in service entrance equipment.
C. Provide SPDs where indicated in the Drawings. SPDs shall be installed integral to electrical distribution equipment by the electrical distribution equipment manufacturer.
1. Locate SPDs on the load side of the main disconnect device, as close as possible to the phase conductors and ground and neutral bar.
2. SPDs and integral disconnects shall be installed in switchboards using a direct bus bar connection or cable connection between each bus bar and SPD. Maximum cable lead length between suppressor and bus bar shall not exceed 14".
3. SPDs shall be integrated within panelboards and shall be direct bus bar mounted.
END OF SECTION 26 67 10
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