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Hydroelectric Generator Protection Relay

400V Low Voltage Hydroelectric Generator Protection Relay

This small hydro unit control system based on our device features automatic startup, excitation, regulation, synchronization, power adjustment, normal & emergency shutdown, and multi-protection for voltage, current, frequency and temperature.

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Description

Overview of Hydroelectric Generator Protection Relay

This Hydroelectric Generator Protection Relay is applicable to hydroelectric generating units with a generator outlet voltage of 400V and single-unit capacity below 1000kW.

Product Positioning

This all-in-one intelligent hydroelectric unit protection and control device integrates complete multi-functions including fault protection, unit speed regulation, generator synchronizing and water level regulation.

As a professional hydroelectric generator protection relay , it serves as an ideal small hydropower plant protection device and an optimal hydropower retrofit relay for upgrading outdated control systems of mini hydropower stations.

Terminal Block

Function of Hydroelectric Generator Protection Relay

Unit Control Functions

  1. One-button startup and one-button shutdown
  2. Water level startup, water level shutdown, water level power regulation
  3. Unit synchronizing function
  4. Unit speed regulation function
  5. Control of other external electric equipment of the unit

Main Protection Functions

  1. Three-stage phase overcurrent protection
  2. Inverse-time phase overcurrent protection
  3. Negative-sequence overcurrent protection
  4. Zero-sequence overcurrent protection
  5. Reverse power protection
  6. Overload protection
  7. Frequency protection
  8. Voltage protection
  9. Non-electrical quantity protection
  10. Control circuit breakage alarm
  11. PT circuit breakage alarm
  12. Fault waveform recording

Generator Protection Relay setting calculation xls

No. Setting Name Setting Range Unit Parameter Description
1 Instantaneous Overcurrent 0.1-100 A Set according to actual conditions, this setting is for printing only
2 Time-Delayed Instantaneous Overcurrent 0.1-100 A Default as Zone 1
3 Time-Delayed Instantaneous Overcurrent Time Delay 0～100 S –
4 Phase Overcurrent 0.1-100 A –
5 Phase Overcurrent Time Delay 0～100 S –
6 Low Voltage Blocking 1～400 V –
7 Negative Voltage Blocking 1～400 V –
8 Inverse Time Phase Overcurrent 0.1-100 A –
9 Inverse Time Phase Overcurrent Time Delay 0～100 S –
10 Inverse Time Phase Overcurrent Type 0~3 – 0=Disabled, 1=Normal Inverse, 2=Very Inverse, 3=Extremely Inverse
11 Overload 0.1-100 A –
12 Overload Time Delay 0～100 S –
13 Overload Type 0~2 – 0=Disabled, 1=Trip, 2=Alarm
14 Zero-Sequence Overcurrent Stage I 0.1-100 A –
15 Zero-Sequence Overcurrent Stage I Time Delay 0～100 S –
16 Zero-Sequence Overcurrent Stage II 0.1-100 A –
17 Zero-Sequence Overcurrent Stage II Time Delay 0～100 S –
18 Zero-Sequence Overcurrent Stage III 0.1-100 A –
19 Zero-Sequence Overcurrent Stage III Time Delay 0～100 S –
20 Zero-Sequence Overcurrent Stage III Type 0~2 – 0=Disabled, 1=Trip, 2=Alarm
21 Zero-Sequence Voltage Blocking Setting 1～400 V –
22 Negative-Sequence Overcurrent Stage I 0.1-100 A –
23 Negative-Sequence Overcurrent Stage I Time Delay 0～100 S –
24 Negative-Sequence Overcurrent Stage II 0.1-100 A –
25 Negative-Sequence Overcurrent Stage II Time Delay 0～100 S –
26 Negative-Sequence Overcurrent Stage II Type 0~2 – 0=Disabled, 1=Trip, 2=Alarm
27 Reverse Power Protection Setting 0.10~900.00 W Reverse power protection setting, set with secondary value
28 Reverse Power Protection Time Delay 0～100 S –
29 Overvoltage Setting 1～600 V –
30 Overvoltage Time Delay 0～100 S –
31 Undervoltage Setting 1～400 V –
32 Undervoltage Time Delay 0～100 S –
33 Zero-Sequence Overvoltage Setting 1～400 V –
34 Zero-Sequence Overvoltage Time Delay 0～100 S –
35 Zero-Sequence Overvoltage Type 0~2 – 0=Disabled, 1=Trip, 2=Alarm
36 Underfrequency Protection Setting 35～65 Hz –
37 Underfrequency Protection Time Delay 0～100 S –
38 Low Voltage Blocking Underfrequency Setting 1～400 V –
39 Slip Frequency Blocking Underfrequency Setting 1～30 Hz/s –
40 Overfrequency Protection Setting 35～65 Hz –
41 Overfrequency Protection Time Delay 0～100 S –
42 PT Circuit Breakage Time Delay 0～100 S –
43 Control Circuit Breakage Time Delay 0～100 S –
44 Non-Electrical Quantity 1 Time Delay 0～100 S –
45 Non-Electrical Quantity 2 Time Delay 0～100 S –
46 Non-Electrical Quantity 3 Time Delay 0～100 S –
47 Non-Electrical Quantity 4 Time Delay 0～100 S –
48 DC Channel 1 Lower Conversion Limit 0-600 – Transmitter calculation value, this setting corresponds to 4mA
49 DC Channel 1 Upper Conversion Limit 0-600 – Transmitter calculation value, this setting corresponds to 20mA
50 DC Channel 2 Lower Conversion Limit 0-600 – –
51 DC Channel 2 Upper Conversion Limit 0-600 – –
52 DC Channel 3 Lower Conversion Limit 0-600 – –
53 DC Channel 3 Upper Conversion Limit 0-600 – –

FAQ

Q: What units is the 400V low voltage hydroelectric generator protection relay suitable for?

A: This 400V hydroelectric generator protection relay applies to mini hydropower generating units with outlet voltage 400V and single unit capacity below 1000kW, widely used in small rural hydropower stations.

Q: What integrated functions does the 400V low voltage hydroelectric generator protection relay have?

A: Our 400V hydroelectric generator protection relay is an all-in-one control device, combining generator fault protection, speed regulation, unit synchronizing and water level power control functions.

Q: Does this 400V low voltage hydroelectric generator protection relay support rotor earth fault protection (ANSI 64R)?

A: Yes. The 400V hydroelectric generator protection relay is equipped with voltage injection type 64R rotor earth fault protection, which is the core protection for hydro generators.

Q: What protection functions are built into the 400V low voltage hydroelectric generator protection relay?

A: This hydroelectric generator protection relay covers three-stage phase overcurrent, reverse power, negative-sequence overcurrent, zero-sequence overcurrent, over/under frequency, PT break alarm, multi-channel non-electrical quantity protection and fault waveform recording.

 

5 reviews for 400V Low Voltage Hydroelectric Generator Protection Relay

  1. Jack –

    This equipment integrates abundant functions. A single unit can fully meet the operation demands of small hydropower stations, which not only cuts costs but also saves installation space.

  2. Jack –

    The product is equipped with comprehensive functions and stable performance, which can meet the operation requirements of small hydropower stations.

  3. Jack –

    The product is excellent and trustworthy.

  4. Jack –

    The product is fully featured and meets all usage requirements.

  5. blake –

    good job

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