Transformer / Generator differential protection relay with time over current protection
Training panel with digital, three-phase current differential protection and overcurrent time protection for machines and transformers (protected object). Fault notifications and operating status are indicated by LEDs and shown on a display.
Functions of current differential and overcurrent time protection
Configurable trip delays
Configurable trip characteristic
Configurable definite-time trip limits
- Current differential protection (Id)
- Stabilising current protection (Is)
Configurable converter ratio
Configurable vector group
Transformer inrush current protection/suppression
Separate adjustable converter ratios for high-voltage and low-voltage sides of the transformer/machine to be protected
Monitoring and protective functions:
- Transformer differential protection (for 2 windings), Id, curve with zero-point calibration and three gradient settings, plus non-stabilised high-current differential stage IdH, stabilisation via 2nd, 4th and 5th harmonics (ANSI 87T)
- Earth current differential protection, IdE, similar curve to 87T (ANSI 87TN)
- Overcurrent/short-circuit protection (non-directional) (ANSI 50P / 51P)
- I2>, asymmetric load protection with evaluation of negative-sequence currents (ANSI 46)
- ThA, overload protection with thermal imaging and separate settings for alarm and tripping (ANSI 49T)
- IH2/In, inrush detection for overcurrent – short-circuit protection (ANSI inrush)
- IE, earth-overcurrent/short-circuit protection (non-directional) (ANSI 50N/51N)
- Circuit breaker failure protection (ANSI 50BF)
- Trip circuit monitoring (ANSI 74TC)
- Current transformer monitoring (ANSI 60L)
Inputs and outputs: 4-mm safety sockets:
- 6 Digital inputs
- 5 Alarm relays (250 VAC, 2 A)
Operation and display:
- LCD with LED backlighting, 128 x 64 pixel resolution
- 14 Arbitrarily definable two-colour LED indicators
- 8 Soft keys for operation and parameter setting
Technical data:
- Nominal current: IN = 1 A
- Nominal voltage: UN = 400 V
- Nominal frequency: 50-60 Hz
- Interfaces: USB, Modbus TCP/IP
- Dimensions: 297 x 456 x 250mm (HxWxD)
- Weight: 7 kg