MMLB / MMLG
Designed as part of the Midos range, these test blocks offer facilities for monitoring and secondary injection testing of any power system protection scheme when used with the multi-fingered test plug type MMLB 01.
The MMLG test block carries 14 circuits, each of which is brought out to separate pairs of terminals at the rear of the case.
Each circuit comprises a pair of internal contacts which are normally sprung together to complete the circuit link through the block when the associated protective equipment is in normal service.
MMLB / MMLG
Designed as part of the Midos range, these test blocks offer facilities for monitoring and secondary injection testing of any power system protection scheme when used with the multi-fingered test plug type MMLB 01.
The MMLG test block carries 14 circuits, each of which is brought out to separate pairs of terminals at the rear of the case.
Each circuit comprises a pair of internal contacts which are normally sprung together to complete the circuit link through the block when the associated protective equipment is in normal service.
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MMLB / MMLG
Designed as part of the Midos range, these test blocks offer facilities for monitoring...
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HGA Hinged Armature Auxiliary Relay
The Type HGA hinged armature auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation, or other auxiliary functions.
HGA Hinged Armature Auxiliary Relay
The Type HGA hinged armature auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation, or other auxiliary functions.
NGA Auxiliary Relay
The Type NGA15 is the general designation for a family of telephone- type DC auxiliary relays mounted in a small molded case similar to Type HGA relays. These auxiliary relays are available with several different contact arrangements and operating times. All models are continuously rated. Some have a surge limiting diode circuit for the operating coil as noted in the Selection Guide.
NGA Auxiliary Relay
The Type NGA15 is the general designation for a family of telephone- type DC auxiliary relays mounted in a small molded case similar to Type HGA relays. These auxiliary relays are available with several different contact arrangements and operating times. All models are continuously rated. Some have a surge limiting diode circuit for the operating coil as noted in the Selection Guide.
HMA Hinged Armature Auxiliary Relay
The Type HMA relay is an instantaneous auxiliary device whose contacts are opened and closed by the movement of a hinged armature.
Type HMA Century Series auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation and other auxiliary functions.
The Century Series coil design provides longer operating life than previous designs as a result of changes in the entire coil insulation system.
HMA Hinged Armature Auxiliary Relay
The Type HMA relay is an instantaneous auxiliary device whose contacts are opened and closed by the movement of a hinged armature.
Type HMA Century Series auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation and other auxiliary functions.
The Century Series coil design provides longer operating life than previous designs as a result of changes in the entire coil insulation system.
HFA Multicontact Auxiliary Relay
The type HFA relay is designed for applications where a number of auxiliary functions must be performed simultaneously. Six contacts are provided. If more than six circuits are to be controlled, the coils of two or more relays may be connected in series (DC only) or in parallel.
HFA Multicontact Auxiliary Relay
The type HFA relay is designed for applications where a number of auxiliary functions must be performed simultaneously. Six contacts are provided. If more than six circuits are to be controlled, the coils of two or more relays may be connected in series (DC only) or in parallel.
HAA Auxiliary or Annunciator Relay
Generally two specific forms of the HAA are available, a current operated unit and a voltage operated unit. Example: HAA15A4 is 0.2/2 A DC and the HAA15B5 is a 125 VDC unit. Also, two general case designs are available. The single units such as HAA 15 use a molded plastic case with glass window and all others the standard drawout case.
HAA Auxiliary or Annunciator Relay
Generally two specific forms of the HAA are available, a current operated unit and a voltage operated unit. Example: HAA15A4 is 0.2/2 A DC and the HAA15B5 is a 125 VDC unit. Also, two general case designs are available. The single units such as HAA 15 use a molded plastic case with glass window and all others the standard drawout case.
HSA Multicontact Hand Reset Auxiliary Relay
The type HSA high-speed multicontact, auxiliary relays are applicable where it is desired that a number of operations be performed simultaneously from the operation of a single relay.
Features and Benefits
- Electrically separate contact outputs
- Universal target dropping
- Mechanical target
- High seismic capability
Applications
- Contact multiplication
Protection and Control
- Trip and/or block close circuit breaker control
HSA Multicontact Hand Reset Auxiliary Relay
The type HSA high-speed multicontact, auxiliary relays are applicable where it is desired that a number of operations be performed simultaneously from the operation of a single relay.
Features and Benefits
- Electrically separate contact outputs
- Universal target dropping
- Mechanical target
- High seismic capability
Applications
- Contact multiplication
Protection and Control
- Trip and/or block close circuit breaker control
HEA Multicontact Auxiliary Relay
The Type HEA high-speed multicontact, auxiliary relays are applicable where it is desired that a number of operations be performed simultaneously from the operation of a single relay.
Features and Benefits
- Electrically separate outputs available
- Various shaft lengths available
- Locks equipment out of service
Applications
- Contact multiplication
Protection and Control
- Trip and/or block close breaker control
HEA Multicontact Auxiliary Relay
The Type HEA high-speed multicontact, auxiliary relays are applicable where it is desired that a number of operations be performed simultaneously from the operation of a single relay.
Features and Benefits
- Electrically separate outputs available
- Various shaft lengths available
- Locks equipment out of service
Applications
- Contact multiplication
Protection and Control
- Trip and/or block close breaker control
MHOR04
Line differential and phase comparison
This high-speed protection for feeders is based on the Merz-Price circulating current system. It is suitable for the majority of plain feeders and provides a single-phase current for comparison over a pilot circuit.
Merz-Price circulating system, single-phase current
MHOR04 is based on the Merz-Price circulating current system. It is operational over privately owned two-core pilots with a relatively high core resistance (up to 1000O loop) level and a low intercore insulation level
MHOR04
Line differential and phase comparison
This high-speed protection for feeders is based on the Merz-Price circulating current system. It is suitable for the majority of plain feeders and provides a single-phase current for comparison over a pilot circuit.
Merz-Price circulating system, single-phase current
MHOR04 is based on the Merz-Price circulating current system. It is operational over privately owned two-core pilots with a relatively high core resistance (up to 1000O loop) level and a low intercore insulation level