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.
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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.
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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.
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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
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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
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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
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MBCI, MCRI, MRTP, and MVTW – Legacy
Differential Feeder
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MMLZ
Auxiliary Modules
The MMLZ range of modules consists of various non-protective devices that have been accommodated in standard Midos cases. The modules, each of which has been designed for a specific purpose, are fully compatible with the Midos range.
MMLZ
Auxiliary Modules
The MMLZ range of modules consists of various non-protective devices that have been accommodated in standard Midos cases. The modules, each of which has been designed for a specific purpose, are fully compatible with the Midos range.
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MVAX 12, 21, 31, 91
Trip Circuit Supervision
The MVAX relay supervises trip circuiting of circuit breakers and initiates audible alarms and visual indications if the trip circuit fails or the mechanism ceases to operate.
The MVAX trip circuit supervision relays can be applied to monitor circuit breaker tripping circuits. They are compact in design and have a user-friendly interface.
MVAX 12, 21, 31, 91
Trip Circuit Supervision
The MVAX relay supervises trip circuiting of circuit breakers and initiates audible alarms and visual indications if the trip circuit fails or the mechanism ceases to operate.
The MVAX trip circuit supervision relays can be applied to monitor circuit breaker tripping circuits. They are compact in design and have a user-friendly interface.
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MVAX 11
Tripping and Interposing Supervision
The type MVAX 11 relay supervises the trip circuit of tripping relays such as the MVAJ or the interposing control relay type MVAW.
The MVAX 11 relay constantly monitors the trip circuit of tripping relays. It is compact and robust in design, has a positive action and no chatter.
MVAX 11
Tripping and Interposing Supervision
The type MVAX 11 relay supervises the trip circuit of tripping relays such as the MVAJ or the interposing control relay type MVAW.
The MVAX 11 relay constantly monitors the trip circuit of tripping relays. It is compact and robust in design, has a positive action and no chatter.
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