Protection Relays

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  2SY212-S Synchronism Check Relay

  The 2SY212 synchronism check relay is designed to measure the phase angle between the monitored single phase voltages on the line & bus sides of a circuit breaker & verify that this angle is less than setting. If the measured angle has met this criteria for the time period defined by setting & the voltage magnitudes meet the criteria established by the Live Line/Bus & U/V Line/Bus settings, the output…
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  2T105 Multi Range Digital Setting Time Delay Relay

  The 2T105 time delay relay is particularly suitable for use in protection & control schemes where precision time delays are required. CB Fail A typical use is for providing a definite time delay in circuit breaker failure protection. For example: The transformer multi-trip relays energize the 2T105 timer & if the circuit breaker (CB) fails to clear the fault within the pre-set (0.6s) the timer times out & operates a…
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  2T749 700 Series Delay On Timer Relay

  The 2T749 Series relays are solid state general purpose time delay relays with electromechanical output contacts. Designed for application wherever a time delay is required with high accuracy, reliable and maintenance free operation. The 700 Series range of electronic measuring relays are manufactured as a modular approach to electrical system protection & control. Designed to meet rigid Australian & international specifications the 700 Series provide a flexible, cost effective &…
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  2T770 700 Series Recycling Timer

  The 2T770 Series relays are solid state general purpose flasher relays with electro-mechanical output contacts. Designed for applications wherever a simple continuous cycling time delay is required. The ON and OFF periods can be ordered with different time ranges. The 700 Series range of electronic measuring relays are manufactured as a modular approach to electrical system protection & control. Designed to meet rigid Australian & international specifications the 700 Series…
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  2V164-S Voltage Regulating & Tap Change Control Relay

  The 2V16x Series relays are designed for the control of motor driven on-load power transformer tap changers. The 2V164-S Voltage Regulator Relay continuously monitors the transformer output voltage & current & provides “RAISE” & “LOWER” control commands to the on-load tap changer such that the load centre is automatically maintained within acceptable limits. Small variations in supply frequency will not affect the system performance. When designing the 2V164-S, considerable emphasis…
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  2V165-S Transformer Parallel Control Relay

  The 2V16x Series relays are designed for the control of motor driven on-load power transformer tap changers. The 2V165 Series relays are designed to monitor & control the tap changers of up to four (4) transformers connected on a common bus & operating in the master slave control configuration. Master follower parallel control schemes traditionally use auxiliary switches on the tap changers to determine out of step errors. While this…
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  2V200 Tap Position Indicator (TPI) Voltage to Frequency Sender Unit

  The 2V200 is specifically designed for operation with the RMS type 2V164 Voltage Regulating Relay (VRR) & application on power transformers fitted with on load tap changers. The 2V200 provides a noise immune interface between the tap changer & a remote tap position indicator (TPI), display. The 2V200 is designed to interface with tap changers using either binary / BCD coded signals or a traditional voltage divider circuit. The 2V200…
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  2V63 Single Phase AC/DC Voltage Relay

  The 2V630 / 2V631 series are solid state voltage sensing relays with electromechanical output contacts built in a fully draw out case format. Designed for application on AC & DC voltage systems, these relays are ideally suited to monitor power supply voltage levels wherever high accuracy and reliable, maintenance free operation is essential. All power to operate the relays is derived from the sensed input voltage therefore an auxiliary supply…
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  2V67-S Four Stage Voltage Relay

  The 2V67-S Series relay is a three pole voltage monitoring relay with four stages of adjustable voltage pick up & drop out points. Each voltage set point can be set for under or overvoltage operation & has an independent time delay driving an output relay. An undervoltage lockout is used to disable the four voltage outputs when the voltage falls below a preset level. A single status input is used…
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  2V68-S BUS Bar CT Supervision & Shorting

  The 2V68 is a three phase monitoring device designed to provide continuous supervision of the CT circuits in high impedance differential protection schemes. The relay will detect open circuit conditions in the CT summation wiring and open circuited main current transformers. (more…)
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  2V73 High Impedance Differential Relay

  The 2V73 relay provides high speed differential protection for various items of power system plant including generators, busbars, motors & the individual windings of power transformers. The 2V73 is also suitable for restricted earth fault applications. The relay measuring element is basically an attracted armature unit of simple & rugged construction powered from a bridge rectifier. Each phase of the relay can be set from 25 to 325V AC in…
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  2V730 700 Series AC Voltage Sensing Relay

  The 2V730 Series relays are solid state voltage sensing relays with electromechanical output contacts. Designed for application on AC voltage systems the 2V730 is ideally suited to monitor power supply voltage levels wherever high accuracy and reliable, maintenance free operation is essential. The 700 Series range of electronic measuring relays are manufactured as a modular approach to electrical system protection & control. Designed to meet rigid Australian & international specifications…
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  2V731 700 Series DC Voltage Sensing Relay

  The 2V731 Series relays are solid state voltage sensing relays with electromechanical output contacts. Designed for application on DC voltage systems the 2V731 is ideally suited to monitor power supply voltage levels wherever high accuracy and reliable, maintenance free operation is essential. The 700 Series range of electronic measuring relays are manufactured as a modular approach to electrical system protection & control. Designed to meet rigid Australian & international specifications…
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  2V75 Metrosil / Resistor Module

  The 2V75 Module provides a compact, simple & cost effective means of fitting a pre-wired three phase Metrosil & stabilizing resistor combination into protection panels employing high impedance differential schemes. Mounting is achieved by first fitting a special panel to the front of the cubicle. This panel is suitable for 19 inch rack or flush mounting. The separate three phase Metrosil module is then installed from the rear of the…
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  2V76 Single Phase Voltage Relay

  The 2V76 series relay is a single phase protection class AC voltage relay. It may be configured for under or over voltage operation & includes a filter for rejection of third harmonics for neutral displacement applications, which may be switched in or out of circuit. A definite time delay element is included which is initiated by the voltage detection circuit & drives the time delayed output contacts. Voltage & time…
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  3A20 Pilot Wire Intertrip Send & Receive Relays

  The operating element of the 3A20 Series is based on the well proven 6R heavy duty attracted armature control relay. The DC version of this relay is inherently immune to AC voltages & the addition of an AC filter circuit & copper shield over the core of the receive relay greatly enhances this attribute while maintaining high sensitivity to DC voltages. A mechanical flag indicator is provided on both the…