Explosion Proof starters
Safe and reliable starting in hazardous applications
Sprecher + Schuh's custom controls panel shop offers explosion proof starters for environments covered by NEMA, UL, NEC & CSA classifications.
Type 7/Type 9 and Type 4 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.
Explosion proof enclosures are also equipped with a watertight Nitrile gasket for compliance with Type 4 specifications.
- Class I, Groups B, C, D
- Class II, Groups E, F, G
- Class III
- Standard 1203
- Hazardous (Classified)
Starting with the best -
At the heart of all Sprecher + Schuh combination explosion proof starters is the 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.
Standard Sprecher + Schuh explosion proof starters are equipped with state of the art CEP7 solid-state overload relays. CEP7 solid state overload relays measure motor current directly through integrated current transformers and on board electronics (ASICs). The electronics provide numerous advantages over electromechanical relays such as increased accuracy, a wider adjustment range, lower energy usage, and less heat generation which requires less cooling.
Combination starters for protection and convenience
Explosion-proof combination starters can include either a UL489 approved Thermal Magnetic Circuit Breaker (MCCB), or non-fusible disconnect. The MCCB utilizes the instantaneous trip ability of a magnetic breaker for short circuit currents combined with the overload tolerance of thermal circuit breakers for normal starting demands. An MCCB can also be quickly reset after the fault has been cleared.
A molded case switch (MCP) is used in applications requiring only a non-fused disconnect.
Sprecher + Schuh uses top of the line molded case circuit breakers and MCPs from quality suppliers.
Factory installed features
A wide range of specially designed explosion proof cover control devices and switches are available.
Explosion proof starters from Sprecher + Schuh are factory assembled in our custom panel shop and can be specified from the catalog with a range of standard options and other modifications, including breather drains, ATEX certifications and any other special requirements you may need.