molded case circuit breakers - Eaton Canada
molded case circuit breakers - Eaton Canada
molded case circuit breakers - Eaton Canada
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SWITCHGEAR (MEDIUM VOLTAGE)<br />
DHP Switchgear Assemblies,<br />
Power Circuit Breakers, and Renewal Parts<br />
PRODUCT HISTORY<br />
March 2001<br />
Low Resolution Photo<br />
Type DHP Drawout Air Magnetic Power Circuit<br />
Breaker (Front Interphase Barrier Removed)<br />
REPLACEMENT CAPABILITIES<br />
150DHP-VR500 1200 Ampere Vacuum Replacement<br />
Breaker for DHP Switchgear<br />
Westinghouse DHP medium voltage<br />
porcel-line metal-clad switchgear with<br />
type DHP air magnetic power <strong>circuit</strong><br />
<strong>breakers</strong> was introduced in 1963. DHP<br />
<strong>breakers</strong> and switchgear were similar to,<br />
but not interchangeable with, the older<br />
DH product. DHP was provided with<br />
porcelain insulation on all live parts to<br />
ground in the switchgear and on the<br />
breaker element. DHP switchgear was<br />
available in indoor and in sheltered aisle<br />
and aisle-less outdoor enclosures.<br />
DHP air magnetic <strong>breakers</strong> were subject to<br />
three major design changes that were<br />
phased in during their manufacturing life.<br />
The first DHP <strong>breakers</strong> were furnished<br />
with solenoid operated mechanisms with<br />
cast parts and monolithic pole units. From<br />
1964 to 1968, the stored energy spring<br />
mechanism gradually phased out the<br />
solenoid operator. After 1968, cast mechanisms<br />
were phased out by fabricated<br />
mechanisms. After 1970, monolithic pole<br />
Cutler-Hammer offers an extensive<br />
amount of products to support DHP<br />
switchgear.<br />
DHP Match and Lineup Cubicles<br />
New manufactured DHP switchgear structures<br />
to match and line up to existing<br />
Westinghouse DHP switchgear are available<br />
in indoor and in outdoor sheltered<br />
aisle and aisle-less enclosure construction.<br />
DHP-VR Vacuum Replacement Breakers<br />
The DHP-VR is a brand new direct roll-in<br />
replacement vacuum breaker for DHP air<br />
magnetic and DVP vacuum <strong>breakers</strong>. The<br />
DHP-VR breaker permits DHP switchgear<br />
modernization by using state-of-the-art<br />
Cutler-Hammer VCP-W vacuum breaker<br />
technology. The DHP-VR is factory<br />
designed and manufactured with complete<br />
factory and ANSI design testing.<br />
New DHP Air Magnetic Breakers<br />
Completely new factory manufactured<br />
DHP air magnetic power <strong>circuit</strong> <strong>breakers</strong><br />
are still available in ratings from<br />
50DHP250 1200 ampere to 150DHP1000<br />
3000 ampere.<br />
Remanufactured DHP Breakers and<br />
Factory Repair Service<br />
Factory remanufacturing of DHP <strong>breakers</strong><br />
and factory repair service for DHP <strong>breakers</strong><br />
are available.<br />
Renewal Parts<br />
Cutler-Hammer offers an extensive inventory<br />
of newly manufactured renewal parts<br />
for DHP switchgear structures and <strong>breakers</strong>.<br />
277<br />
units were phased out by the postinsulator<br />
pole unit (PIP) design.<br />
DVP vacuum <strong>breakers</strong> were introduced in<br />
1978. DVP <strong>breakers</strong> were first generation<br />
vacuum <strong>breakers</strong> that were interchangeable<br />
in DHP switchgear with DHP air<br />
magnetic <strong>breakers</strong> of the same ratings.<br />
Ratings<br />
DHP Breakers: 5 kV (75, 250 and<br />
350 MVA)<br />
7.5 kV (500 MVA)<br />
15 kV (500, 750 and<br />
1000 MVA)<br />
DVP Breakers: 7.5 kV (500 MVA) and<br />
15 kV (500 and 750 MVA)<br />
Chronology<br />
DHP switchgear was introduced in<br />
1963 and was actively manufactured by<br />
Westinghouse in complete switchgear<br />
assemblies until 1984.<br />
T
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