|
"ISO
9001:2000 Certified"
| |
Externally Mounted Medium Exposure Specification
PART 1 GENERAL
- SECTION INCLUDES
- Description
- This section describes the materials and installation requirements for surge protective devices (SPD) for the protection of all AC electrical circuits.
PART 2 PRODUCT
- SURGE SUPPRESSOR
- Surge Suppressor
- SPD shall be listed in accordance with UL 1449 Second Edition to include Section 37.3 highest fault current category. SPD shall be UL 1283 listed.
- SPD shall provide surge current diversion paths for all modes of protection; L-N, L-G, N-G in WYE systems, and L-L, L-G in DELTA systems.
- SPD for service entrance applications shall be modular in design. Each mode including N-G shall be fused with a 200kAIC UL recognized surge rated fuse and incorporate a thermal cutout device.
- Service entrance SPD shall provide audible diagnostic monitoring by way of audible alarm. This alarm shall activate upon a fault condition. An alarm on/off switch shall be provided to silence the alarm. An alarm push to test switch shall be provided.
- If a dedicated breaker for the SPD is not provided in the switchboard, the service entrance SPD shall include an integral UL Recognized disconnect switch. A dedicated breaker shall serve as a means of disconnect for distribution SPD’s.
- SPD shall meet or exceed the following criteria:
- Minimum surge current capability (single pulse rated) per phase shall be:
- Service entrance applications: 240kA per phase
- Distribution applications: 80kA per phase
b. UL 1449 Listed Suppression Voltage Ratings for service entrance shall not exceed the following
VOLTAGE L-N L-G N-G MCOV
208Y/120V 330 330 330 150V
480Y/277V 600 600 600 320V
(With service entrance Internal Disconnect Switch 400V and 700V respectively.)
c. UL 1449 Listed Suppression Voltage Ratings for distribution shall not exceed the following:
VOLTAGE L-N L-G N-G MCOV
208Y/120V 330 330 330 150V
480Y/277V 700 700 600 320V
- SPD shall have a minimum EMI/RFI filtering of –50dB at 100kHz with an insertion ratio of 50:1 using MIL-STD-220A methodology.
- SPD shall be provided with one set of NO/NC dry contacts.
- SPD shall have a warranty for a period of five years, incorporating unlimited replacements of suppressor parts if they are destroyed by transients during the warranty period.
2.02 MANUFACTURERS
- Approved Vendors: Advanced Protection Technologies TE/XGA/240 for service entrance, and TE/XF for distribution.
2.03 EXECUTION
- Service Entrance:
- One primary suppressor shall be installed external to the service entrance in accordance with manufacturer instructions.
- The SPD shall be installed on the load side.
- The SPD ground shall be bonded to the service entrance ground.
- Distribution Panelboards:
- One suppressor shall be installed external to each designated distribution panelboard.
- The surge suppression device shall be installed in accordance with manufacturer instructions.
END OF SECTION
|
