Transfer Switch
2.0 Specifications and Certifications
Specifications
Switch Mechanism | Solenoid Actuation |
|
Short Circuit Ratings of Transfer Switches | RMS Symmetrical Amperes |
|
100 A | 42,000 |
|
200 A | 50,000 | When protected by |
260, 400, 600 A | 65,000 | a circuit breaker. |
800, 1000, 1250 A | 85,000 |
|
Control Voltage | 120 VAC |
|
90% of normal source voltage | ||
| 90% of emergency source voltage | |
84% of normal source voltage | ||
| 84% of emergency source voltage | |
Auxiliary Contacts | 10 A, 125/250 VAC |
|
Note
Time delay settings and voltage
Certifications
Hubbell’s Automatic transfer switches meet the requirements for all of the certifications listed below.
UL 1008 Standard for Safety for automatic transfer switches
NEC Article 517, Health Care facilities NEC Article 702, Optional Standby Systems
NEC Article 701, Legally Required Standby Systems
NFPA 20 Installation of Fire Pumps
3.0 Installation
Refer to the transfer switch nameplate to ensure that the voltage, current, and horsepower ratings are compatible with the load.
Refer to the receiving, handling, storage, installation, and inspection procedures in the Instruction Manual that accompanies the combination Fire Pump Controller and automatic transfer switch. Many of the procedures in the installation section are applicable to the automatic transfer switch in the adjoining cabinet. For automatic transfer switches sold as an individual unit, and for additional information, follow the procedures below.
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