MAG10x Series

 
MAG10x - UNIVERSAL GENERATOR / MOTOR PROTECTIVE GUARD
  • Combined Reverse Power, Overload, Over Current and Short Circuit functions
  • Available for 3-phase, 3-wire (2W3) or 4-wire (3W4) systems
  • The Pathfinder function eases fault finding (Over Current & Short Circuit)
  • Predictor early action feature
  • Up to two individual very fast analogue output signals (<50mS), (optional)
  • DIN96 Slave Indicator with status LEDs (optional)
Description
The digitally controlled MAG10x generator guard combines Reverse Power (R/P), Overload (O/L), Over Current (O/C) and Short Circuit protection (S/C) in one unit. Features depend on selected model.

The unit measures the voltage and current true r.m.s. value, and accuracy is independent of any wave form distortion. Less than 50mS processing time.

The standard models takes the auxiliary supply voltage from the monitored voltage (terminal 1 & 2).

It can also be delivered with optional separate AC or DC auxiliary voltage (terminal 26 & 27), but that must be specified when ordering (see page 4 for ordering code for separate Aux. Supply).

User settable trip levels and delays. Colour of LEDs indicate alarm status. Alarm LEDs flash during count-down.

Start of monitoring function is delayed when power is switched on (default 2 secs delay). In this way false tripping during power up is avoided.

The DIN-rail mounted instrument reads the power level directly in kW. The optional slave watt-meter and the triple-zone status LEDs at a glance gives the clear safety message:
  • Over Current / Short Circuit
  • Normal
  • Reverse Power
PREDICTOR
The main feature of the Predictor function is to open bus-tie breakers or trip heavy loads to prevent a total blackout situation. The predictor relay(s) trips at set over current (O/C) or short circuit current (S/C) level, prior to the generator breaker trip. If the overload condition is still present after this load reduction the generator breaker will trip 1sec or 200mS later relative to set O/C or S/C time delays.

PATHFINDER
The Pathfinder indicates the phase causing an overcurrent or short circuit trip by the flashing pattern of the relevant LED.

OUTPUTS
Up to two individual very fast analogue output signals (optional) proportional to range (A or kW). This may be used as an input to a control system, to detect abnormal power conditions (loss of excitation etc). If output is used for remote meter reading, we recommend 0-1mA for the slave indicator.

RELAY OUTPUTS
A trip timer will reset if the fault is removed during count-down. Remote alarm reset input. Fixed hysteresis prevents relay "chatter". Full functionality control during power-up/power-down, with 500mS power-out reservoir.

Relay operation depends on the selected model. Other combinations are available on request.
 
Description

MAG100x (2W3) - MAG104x (3W4)
Over Current, Short Circuit and Reverse Power Guard
Both relays simultaneously trip after the full Reverse Power, Over Current or Short Circuit definite time delay. Depending on application either the NC or NO contact of relay R2 or R3 can be used to operate the generator breaker. The opposite relay may be used for alarm, etc. R1 is a separate Short Circuit alarm relay.

Models
MAG100
MAG100FA  
MAG100FB
MAG104
MAG104FA
MAG104FB
 
MAG100Ax (2W3) - MAG104Ax (3W4)
Over Current, Short Circuit and Reverse Power Guard
With three separate relays (R1, R2 and R3). R1 and R3 are normally energised (fail to safety), R2 is normally de-energised. Each relay will trip after the Reverse Power, Over Current or Short Circuit pre-set time delay.

Models
MAG100A
MAG100AFA  
MAG100AFB
MAG104A
MAG104AFA
MAG104AFB
 
MAG100Ex (2W3) - MAG104Ex (3W4)
Over Current, Short Circuit and Reverse Power Guard
R3 trips after the full Reverse Power, Over Current or Short Circuit definite time delay. Depending on application either the NC or NO contact can be used to operate the generator breaker. R1 and R2 are additional alarm relays and can be used to provide an alarm signal to an alarm system or PM-System.

Models
MAG100E
MAG100EFA  
MAG100EFB
MAG104E
MAG104EFA
MAG104EFB
 
MAG100Cx (2W3) - MAG104Cx (3W4)
Over Current, kW Overload and Reverse Power Guard
With three separate relays (R1, R2 and R3). R1 is fail safe and energises when the unit is powered. R2 & R3 are normally de-energised. Each relay will trip after the Reverse Power, Overload or Over Current pre-set time delay.

Models
MAG100C
MAG100CFA  
MAG100CFB
MAG104C
MAG104CFA
MAG104CFB
 
MAG100Dx (2W3) - MAG104Dx (3W4)
2 x Over Current and Reverse Power Guard
Both R1 & R3 simultaneously trip after the full Reverse Power or Over Current definite time delay. Depending on application either the NC or NO contact of relay R1 or R3 can be used to operate the generator breaker. R2 is a separate Over Current alarm (O/C2) with individual setting. This can be used as a preferential trip or for early action functionality. R2 auto-resets when the fault is removed.

Models
MAG100D
MAG100DFA  
MAG100DFB
MAG104D
MAG104DFA
MAG104DFB
 
MAG102x (2W3) - MAG106x (3W4)
Over Current, Short Circuit and Reverse Power Guard with PREDICTOR early action (R1 & R2) function
One common relay (R3) for generator breaker trip, and two early action Predictor relays (R1 & R2) for preference load tripping and/or bus-tie breaker opening. R3 de-energises at trip. R3 trips after the full set Reverse Power, Over Current or Short Circuit definite time delay and is used to open the generator breaker. R1 will trip 1 second before the set O/C trip and R2 will trip 200mS before the set S/C trip. The Predictor function may prevent an anticipated blackout.

Models
MAG102
MAG102FA  
MAG102FB
MAG106
MAG106FA
MAG106FB
 
MAG102Bx (2W3) - MAG106Bx (3W4)
Over Current, Short Circuit and Reverse Power Guard with PREDICTOR early action (R2) function
One common relay (R3) for generator breaker trip, and an early action Predictor relay (R2) for preference load tripping and/or bus-tie breaker opening. R3 de-energises at trip. R1 is an additional common alarm relay. R2, the predictor relay, will trip 1sec before R3 on O/C & 200mS (400mS optional) before R3 on S/C trip. The Predictor function may prevent an anticipated blackout. R3 trips after the full set Reverse Power, Over Current or Short Circuit definite time delay and is used to open the generator breaker. The release time on O/C & S/C will be setpoint + the predictor time. (+200mS for S/C & 1 sec for O/C).

Models
MAG102B
MAG102BFA  
MAG102BFB
MAG106B
MAG106BFA
MAG106BFB

 
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