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GCM02-MT-ING4 NEW.doc c/02 04/03/2003 ENG Page 23 of 57
2.7. MEASURING THE GENERATOR’S AND MAINS PARAMETERS
The voltmeter measurements indicate the actual real value (RMS) and are at a precision of 1%. The unit has a deviation of …..V +/- to
measure temperatures between –20 and +70°C.
SINGLE / THREE PHASE MAINS SENSOR
The three phase mains sensor is made with three 500 K OHM resistance dividers with high insulation voltage capable of withstanding
any excessive voltages of up to 8Kv for 1 second. It is sensitive to the minimum and maximum voltage on the single phase and to the
phase displacement angle of the three phases. All parameters can be modified, the sensibility to the sequence of the phases can be
activated. Main characteristics:
Mains control Three phase
Functions 27 – 59 – 60 - 81 – 47
Working voltage 100 – 600 V ac
Minimum adjustable voltage (OFF) 60 – 400V (27)
Maximum adjustable voltage 110 - 600V (OFF) (59)
Tripping differential voltage 30V on MIN – 15V on MAX
Insulation voltage on L1-L2-L3-L4 => 8 KV for 1s
Working frequency 50-60 Hz
Minimum and maximum programmable frequency Min 35 - 55 Hz Max 51 – 75 Hz (81) (OFF)
Phase sequence L1 – L2 – L3 can be activated
When the software is used to configure the sensor, in biphase, the control is activated only on connections L1 - L2.
Mains control Biphase
Use voltage
100 – 600 V ca
Min adjustable voltage
(OFF) 60 - 400V (27)
Max adjustable voltage 110 – 600V (OFF) (59)
Intervention differential voltage
30V on MIN – 15V on MAX
When the software is used to configure the sensor, in single phase, the controls on connections L1 – L4 are activated.
Network control Single phase
Voltages used 70 – 340 V ac
Adjustable minimum voltage 70 - 280V (27)
Adjustable maximum voltage 110 – 300V (59)
Intervention voltage differential 20V on MIN – 10V on MAX
Bringing the MIN V GEN, MIN HZ, MAX V and MAX HZ values over the programmed maximum, the OFF function can be
activated to deactivate the control.
(*) FUNCTIONS
27 Min voltage
59 Max voltage
60 Dissymmetry
81 Protection for min/max frequency
47 Sequence phases
50 Instant current or short-circuit
51 Max current with programmable delay
87G Protection differential of breakdown to earth
32 Protection by energy's inverse or directional power protection
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