Soft Starters & Starters

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.

Safty Standards
Organization Standard
NEC Class I, Groups B, C, D
Class II, Groups E, F, G
Class III
UL Standard 1203
Hazardous (Classified)
CSA Standard 22.2

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.

KWIK starters

Sprecher + Schuh offers a broad selection of pre-assembled or "build-from-stock" starters housed in either a CUL-approved Type 1, 12K enclosure or a UL-Approved Type 4, 4X, 12 enclosure.

Built for convenience, space savings and economy, KWIK starters are efficiently designed to use stock CA7 contactors and CT7K thermal overload relays or the advanced CEP7 solid state overload.

Contactor and overload are either prewired and pre-mounted onto the enclosure's built-in DIN-rail or may be ordered as separate components. Ample knockouts and open terminals guarantee quick, no fuss wiring.

Often referred to as "manual type" starters, the KWIK starters are full-voltage magnetic motor starters complete with electrically-connected pushbuttons or selector switches.

KWIK starters are sized for most industrial applications

These starters control motors up to 25HP @ 460V (30HP @ 575V) in an enclosure measuring only 187 x 90mm (7-3/8" x 3-1/2"). This covers over 85% of industrial motor control applications in a very compact package that can be mounted adjacent to or directly on equipment.

Designed for Simplicity

The enclosure for the KWIK starter is designed for simplicity. The START button mechanically interfaces with a special side mounted N.O. auxiliary (Cat.# CA7-PA-H10) with minimal wiring. The STOP button also mechanically interfaces with the N.C. contact on the overload relay, providing STOP and RESET functions with no additional wirig.

On/Off or Hand/Off/Auto selectors are also available options in the (30 - 43A) contactor series with (9 - 45A) overload relay.

Sprecher + Schuh Soft Starters

PCS Series to 400 HP Overview

The PCS electric motor soft starter Controller is one of Sprecher + Schuh's newest solid-state controllers, with rich features at an economical price. This softstarter is specifically designed to start 3-phase electric motors (up to 400HP @ 460V / 500HP @ 575V), but is very compact, easy to use and DIN-rail mountable for models up to 85A. Four standard starting modes are available with the PCS Controller:

Extending the PCS Softstarter Controllers, 108...480 Amps

The PCS product offering has been expanded from 85A to 480A (up to 400HP @ 460V). The new range provides a highly accurate and reliable device with increased intelligence in a compact footprint.

PF Series to 1000 HP (3-wire), or 1400 HP (6 wire) Overview

These intelligent electric motor soft starters offer precise programming set-up with built-in keypad & LCD display, and are provided with eight standard starting modes:

The PF electric motor soft starters are fully intelligent devices that have the following features:

Self Contained, Ready To Install

In one small package, PCS electric motor Controllers offer a built-in overload relay, a bypass contactor and a microprocessor controller that provides soft starting for most industrial applications. The standard Soft Start mode provides a smooth voltage ramp-up to full motor speed, while the Current Limit Starting mode limits inrush in high inertia applications. A Soft Stop feature ramps down high friction loads smoothly, eliminating sudden deceleration in these applications.

For Use Anywhere

Sprecher Schuh PCS electric motor Softstarters come in three different frame sizes. The smallest frame is from 3A...37A, the middle size is from 43A...85A and the largest frame size is 108A...135A. These units are available from 200V...600V - 50/60 Hz. This assures the devices can be used anywhere in the world.

Connect any soft-starter to KT7 Motor Circuit Controllers for branch circuit protection

Many convenient features

PCS Soft-starters are reliable and easy to use.

Features include: