BF20, ochranné relé poruchy vypínače a zemního spojení

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BF20, ochranné relé poruchy vypínače a zemního spojení

Ochranné relé poruchy vypínače BF20

  Odkaz na stránky výrobce

Funkce: 50BF

Ochranné relé poruchy vypínače (nadproudová ochrana) a ochrana zemního spojení Microelettrica Scientifica řady BF3 s nezávislou časovou charakteristikou, 2 LED... 

All versions are fitted with blocking input controlled by the Normally Open status signalling contact (52a) of the Circuit Breaker – Relay is blocked when the C/B is open.

SETTINGS

Settings are made on front face by means of four 4-pole DIP SWITCHES that allow to obtain a wide and accurate setting range for the following regulations:

• Trip level of the 50BF element
• Trip time delay of the 50BF element
• Trip level of the 50NBF element ‰ Trip time delay of the 50NBF element 

SIGNALIZATION

• 1 Green led for signalization of auxiliary power supply presence and relay regular operation.
• 1Red led for F50BF trip signalization.
• 1Yellow led for F50NBF trip signalization.

COMMANDS

• Three position spring lever switch for test: when operated it simulates a current flow of 5 times the rated input current and allows the complete functional check of the relay and of the trip time delays. In one position test function does not operate the output relays; in the other it also operates the output relays.
• Output relays reset after trip can be: - manual by reset push-button on front face - manual by remote push-button connected to the relevant terminals provided on relay terminal board

The trip signal LEDS can be reset only by the front face reset push button.

OUTPUT RELAYS

Two output relays are provided:

• R1 time delayed trip
• R2 instantaneous trip

each with the following choice of contacts combination:

• 1 NO+1 NC (standard version), or 2 NO or 2 NC (on request)

The output relays are normally deenergized and are energized on tripping.

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