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RCB-2:Residual current device 2-pole
* Residual current devices RCB-2 are used as protection of energized parts in a circuit against indirect touching. It is a protection against direct touching, against residual voltage on grounded parts which apear when there is a fault in eletrical installation and for prostection against direct contact with energized parts in case IΔN ≥ 30 mA.
* RCDs can be used in the main systems TN-S, TN-C, TT or in other words - in all systems where there is separated neutral and protective wire (VDE 0100 part 410).
* Residual current device RCB-2:
* Type A - sensitive to alternating and pulsating direct current
* Type AC - sensitive to alternatingt and residual current
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Residual current circuit breakers EFI are used for protection against indirect touching of parts under voltage, for
prevention of lasting voltage on earthed parts which should appear because of a defect in the electrical installation
and for protection against direct contacts of parts under voltage in case of I < 30mA. Residual current circuit breakers
can be used in TN-S, TN-C, TT and IT network systems or with other words in all systems where neutral and protective
conductor are separated (VDE 0100 Teil 410).
Types - Our programme comprises residual current circuit breakers which are sensitive to alternating residual current
(AC-type) and residual current circuit breakers which are sensitive to alternating and pulsating direct current (A-type).
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With a residual current circuit breaker (RCCB) the following protective measures are available: fault protection, protection against fire and additional protection in case of direct contact.
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Maximum safety and continuity of the electric power supply
REC2 is a self-reclosing system that uses consecutive time sequences, with an additional insulation control capacity, so that it does not reclose the unit until the problem has been solved. Therefore, it maintains the highest continuity of the electrical service under the maximum safety levels, with the minimum number of reclosures needed when the electrical installation requires so. Years of experience in these applications leads us to:
- A safe earth leakage protection unit.
- Maximum self-reclosing guarantees.
- More compact and modular.
The new REC2 can act in two ways, according to prior selection:
- Self-reclosing, by time (various reclosure attempts in a time sequence)
- A second option is that once the earth leakage system has tripped, the unit checks if there is a leak, measuring the insulation of the installation before the self-reclosing process is carried out.
The system guarantees the maximum continuity of the electric power supply in homes, shops, industries, etc. while it guarantees the protection against any form of earth leakage.
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Transformer differential protection systems: DQ2S 2, DQ3S 2
Devices DQ2S2 and DQ3S2 are complex protectors for use with transformers- and motors.
Their main purpose is to stabilize differential protection. Two base models are available:
- DQ2S 2 for two-winding transformers
- DQ3S2 for three-winding transformers
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Residual current circuit breakers up to 125A
Description
Nominal current:1 to 125 A
30mA sensitivity:additional protection against direct contact (in accordance with IEC 364)
100, 300, 500 mA sensitivities:additional protection against fire and indirect contact (in accordance with IEC 364)
B type:protection of installations with three-phase rectifier
Type "si": protection of sensitive circuits (computing equipment) and those prone to disturbances (ballast lighting, power electronics)
Selective version :tripping of the device the closest to the fault
Compliance with standards:IEC EN 61008 certified by national official authorities
Suitable for isolation in accordance with industrial standards: IEC 60947
Operating voltage:up to 440Vac, insulation voltage: 500V
Optional auxiliaries:indication of state and tripping, shunt trip, undervoltage trip, overvoltage trip
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Earth Leakage and its associated hazard can be prevented by residual current circuit breakers (RCCBs), also popularly known as Earth Leakage Circuit Breakers. RCCBs operate by comparing the current flowing into an appliance with the current flowing out. A discrepancy will cause the breaker to trip and disconnect the apliance from the main supply. They are used in both single phase and three phase applications.
The MIG0603CB is a specially designed generator for impulse test on circuit breakers. The following waveshapes can be generated:
8/20ìs up to 3000 A
0.5ìs 100 kHz up to 250 A
1.2/50ìs 500 Ohm up to 12 kV
The peak output voltage and current of the MIG0603CB are indicated on the front display. The two BNC monitor outputs (v,i) allow monitoring the voltage and current wave shapes on an oscilloscope.
A coupling and de-coupling network is included to superimpose the SURGE on a two wire power supply.
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