Description

Woodward Basic Line family Din rail supervision relay

Woodward Basic Line family  supervision relays for low voltage applications are equipped with a precise micro-controller and designed for DIN-rail mounting. They are easy to operate and simplify commissioning. This is advance technology at low price. Rated voltage and frequency can be set by means of DIP switches; pick-up values and tripping delays via potentiometers. The wide-range power supply for AC and DC make these relays universal.

BU1AC AC Voltage Relay : Woodward Basic Line family

Unit BU1-AC is equipped with an independent over- (U>) and undervoltage supervision (U<) with separate adjustable pickup values and common trip delay (t) and hysteresis (DIFF). The voltages are compared with the set reference values. For three-phase overvoltage supervision the highest voltage in each phase is evaluated, for under-voltage supervision the lowest in each phase.

Pickup of supervision circuit U> or U< is indicated by flashing of the corresponding LED. At U< – tripping LED U< extinguishes, at U> – tripping. LED U> is steady lit. At voltages < 60 % Un no trip delay takes place. Unit BU1-AC is designed to be fastened onto a DIN-rail acc. to DIN EN 50022 same as all units of the BASIC LINE.

The front panel of the unit is protected with a sealable transparent cover (IP40). LED U< is used to indicate trouble free operation with steady light. LEDs U> and U< indicate pickup of the re-lay by flashing. At undervoltage tripping LED U< extinguishes. LED U> indicates tripping at overvoltage (steady light).

Unit BU1-AC needs no separate auxiliary voltage sup-ply. The supply voltage can be formed direct-ly from the measuring quantity.

Rated voltage 110 V/AC

400/230 V/AC (400 V four-wire-/two-wire-system)

690/400 V/AC (690 V two-wire-system/ 400 V three-wire-system)

BUA1 Voltage- and Voltage Balance Relay : Woodward Basic Line family

Applications

•  Voltage unbalance in three-phase systems
•  Phase failure
•  Phase sequence
•  Under-/overvoltage
• The relay BUA1 measures amplitude and angle of three phase voltages. The angle of the phasors determine the phase sequence. Unbalance and phase loss are detected by the measurement of amplitude and angle.
• ΔU characterizes the difference of the lowest to the highest phase-to-phase voltage related to nominal voltage. The underfrequency element trips if the frequency falls below 45 Hz.
• Features
  Rated voltage Un: 110 V, 230 V, 400 V AC
  • Frequency range: 45 – 66 Hz
  • Returning time: 600 ms
  • Minimum operating time: 650 ms
  • Shock: class 1 acc. to DIN IEC 255-21-2
  • Vibration: class 1 acc. to DIN IEC 255-21-1
  • Degree of protection: IP 40 at closed front cove

Rated voltage 110 V/AC

230 V/AC

400 V/AC

BU1DC2 Voltage Relay : Woodward Basic Line family

Applications

•  Supervision of DC voltages

The Woodward BU1DC2 is a voltage relay specifically designed for the supervision of DC voltages.

Unit BU1-DC2 is equipped with an over- (U>) and undervoltage supervision (U <) with separate adjustable pick-up values ​​and common trip delay (t) and hysteresis (DIFF). The DC voltage measured is constantly compared with the set reference values. Any voltage signal, which exceeds the set reference value for overvoltage, or falls below the set reference value for undervoltage, will cause the respective relay to trip after elaps of the time delay. Pick-up of the supervision circuit, either U> or U <, is displayed by the corresponding flashing LED. At undervoltage tripping LED U <extinguishes. At U> -tripping LED U> is steady lit.

Rated voltage 24 V/DC

BF1 Frequency Relay

Rated voltage 110 V/AC

230 V/AC

400 V/AC

Applications

•  Under- and overfrequency supervision of single or three-phase systems

•  DIN-rail mounting
• The unit BF1 is equipped with an independent over- (f>) and underfrequency supervision (f<) with separate adjustable pickup values and trip delays. The measured frequency is continuously com-pared with the set reference values.
  For frequency supervision the cycle duration is evaluated and so measuring is virtually independent on harmonics. To avoid tripping during normal operation due to interference voltages, a fixed mea-suring repetition is used.
• Technical data
  rated voltage Un: 110 V, 230 V, 400 V AC
  • frequency range at
  – 50 Hz rated frequency: 46 – 54 Hz
  – 60 Hz rated frequency: 55,2 – 64,8 Hz
  • hysteresis: 0,5% of nominal frequency
  • power consumption: 3,7 VA
  • thermal load carrying capacity: continuously 1,3 x Un
  • returning time: 250 ms
  • minimum operating time: 250 ms
• Output relays:
  max. breaking capacity
  • ohmic: 250 V AC/120 W DC
  • inductive: 500 V AC/75 W DC
  • rated current: 5 A
  • making current: 20 A
• System data:
  regulations: VDE 0435 part 303
  • temperature range at storage and operation: – 25°C bis + 70°C
• Mechanical stress:
  shock: class 1 acc. to DIN IEC 255-21-2
  vibration: class 1 acc. to DIN IEC 255-21-1
  degree of protection: IP 40 at closed front cover
  weight: approx. 0,5 kg
  mounting position: any

BN1400 Mains Decoupling Relay/Interchange Protection

Unit BN1-400 of the BASIC LINE is an universal mains decoupling device to monitor the phase-toneutral volt-ages and contains the protective functions required of VDEW and most other utilities for the mains parallel operation of power stations:

• over- and undervoltage protection
• over- and underfrequency protection
• fast decoupling of the generator in case of mains failure
• Phase sequence supervision When compared to conventional devices an exceptional price/performance ratio is achieved by integration of the three protective functions in one device.

When compared to the conventional protection equipment all relays of the BASIC LINE reflect the superiority of digital protection techniques with the following features:

• High measuring accuracy by digital data processing
• Fault indication via LEDs
• Very fine graded wide setting ranges
• RMS measurement
• Extremely short response time
• Compact design by SMD-technolog

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