Starters & Enclosed Products
Explosion-Proof Starters
Safe and reliable starting in hazardous applications
Sprecher + Schuh’s custom controls panel shop offers explosionproof starters for environments covered by the following classifications:
| NEMA: | 7BCD, 9EFG |
| NEC: | Class I, Groups B, C, D Class II, Groups E, F, GClass III |
| UL: | Standard 1203 Hazardous (Classified)Locations |
| CSA: | Standard 22.2 |
Type 7 and Type 9 protection
Type 7 enclosures are designed to provide protection against an internal explosion when operated in a hazardous gas environment. Type 9 enclosures protect from internal explosion in a hazardous dust environment. Both types must also prevent enclosed heat generating mechanisms from causing external surfaces to reach temperatures capable of igniting explosive gas-air mixtures in the surrounding atmosphere. Sprecher + Schuh explosion- proof starters meet all requirements of both classifications.
Starting with the best
At the heart of all explosion-proof starters is Sprecher + Schuh's new CAT7 and CAT6 line of motor starters. These starters are compact and offer intermediate sizes to better match specific motor requirements. This equates to generous wiring space and less wasted horsepower capacity.
Top line protection...
Explosion Proof starters are equipped with Sprecher + Schuh's new CEP7 solid state overload relay. Unlike traditional overload relays that indirectly sense motor current through heater elements, CEP7 solid state overload relays measure motor current directly through integrated current transformers and on board electronics. The electronics provide numerous advantages over electromechanical relays.
Combination starters for protection and convenience
Explosion-proof combination starters can include either a Motor Circuit Protector or non-fusible disconnect. The Motor Circuit Protector (MCP) is an adjustable "magnetic trip only" circuit breaker for precise protection of motor circuits. An MCP prevents single phasing by simultaneously opening all three phases when a fault occurs in any one phase. An MCP can also be quickly reset after the fault has been cleared. Interrupting capacity can be increased to 100,000 amperes by adding a current limiter (contact factory for this option). A molded case switch (MCS) is used in applications requiring a non-fused disconnect.