YT-ZFP-Ⅰ Load Distributor (Frequency Control Load Adjustment Device)

Product Introduction

The YT-ZFP-Ⅰ load divider (frequency and load regulation device) is used to automatically adjust the operating frequency of a power station operating stably in parallel and the active power distribution among generators operating in parallel, ensuring that the frequency and active power distribution accuracy of the power station are within a set range. The load divider can also automatically transfer loads and disconnect the generator by inputting an external "load transfer" command.

Specifications

YT-ZFP-Ⅰ Load Divider (Frequency and Load Regulation Device)

The YT-ZFP load divider is used to automatically adjust the operating frequency of a power station operating stably in parallel and the active power distribution among parallel generators, ensuring that the frequency and active power distribution accuracy of the power station are within a set range. The load divider can also automatically transfer loads and disconnect the generator by inputting an external "load transfer" command.

Product Categories

I. Technical Specifications

1. Input Voltage: AC100V-220V-380V-440V, Power Consumption: <3VA

Input Current: AC0~5A, Power Consumption: <2VA

Input Frequency: 50Hz or 60Hz

2. The load distributor can operate normally when the substation voltage change ΔU < ±10% and the substation frequency change Δf < ±5%.

3. When the substation load changes from 20% to 100% of the rated total power, the active power distribution accuracy is <10%, and the load power factor should be 0.5~1 (lagging).

4. When the substation load changes from no-load to full-load, the steady-state frequency of the substation can be maintained at 50Hz ±0.5Hz (or 60Hz ±0.5Hz).

5. 6. Features load transfer function: Accepts manual load transfer commands (terminals 3# and 4#) and automatically transfers the load from the disconnected generator. When the load is transferred to within 10% of the rated power, it automatically issues a trip command (29# and 30# passive NO).

7. Features light load output function: Issues a light load signal (5# and 6# passive NO) when the generator set's load is less than 10%.

8. Features reverse power output function (YT-ZFP-2 type only): When the generator set experiences 10% (or 15%) reverse power, this device issues a reverse power signal (7# and 8# passive NO) after 5 seconds (or 10 seconds). The user needs to specify the reverse power value and delay time when ordering and confirm it in the contract.

9. It features start/stop output function (YT-ZFP-3 model only). When the generator set's load is >80%, this device issues a start command to start the corresponding generator set; when the generator set's load is <20%, the load distributor issues a stop command to stop the corresponding generator set. Both start and stop operations use a passive changeover contact with one normally open and one normally closed contact.

9. Output contact load capacity: Acceleration, deceleration, tripping: AC250V/12A; DC30V/12A (resistive load)

Load transfer indication: AC125V/0.5A; DC30V/1A (resistive load)

Light load: AC250V/8A; DC30V/8A (resistive load)

Reverse power: AC250V/8A; DC30V/8A (resistive load)

Starting: AC250V/8A; DC30V/8A (resistive load)

Shutdown: AC250V/8A; DC30V/8A (resistive load)

10. This device has a self-test function, meaning that when the device is in self-test mode, it can check the acceleration, deceleration, and load transfer functions.

11. Environmental conditions: Ambient temperature 0~55℃, relative humidity 95%, subject to vibration, oil mist, and salt spray from ship operation.

II. Instructions for Use

1. The device panel features one power switch and 6 to 8 indicator lights: POWER, INCR, DECR, C/B, UNLOAD, LOW-P, -P (YT-ZFP-2), START, STOP (YT-ZFP-3), and four setting knobs: speed adjustment (Tn), load adjustment accuracy (ΔP), frequency adjustment accuracy (Δf), and mode selection (MODE).

2. Ensure correct connection according to the external wiring diagram. The corresponding terminals for voltage Uac and current Ia and Ic should match the device's wiring markings.

Note: When multiple generators are operating in parallel, connect terminals #13 of each device to each other, and terminals #14 of each device to each other; the voltage between these terminals corresponds to the average power (Pa) of the multiple generators.

3. Mode Selection:

a) When the device is operating normally, it runs in "Average Power" mode (mode selection knob is set to "0").

b) The device has a self-test function, which is divided into offline self-test (generator not connected) and generator self-test (generator connected). During the self-test, the indicator light for the corresponding function illuminates, and the output relay does not activate.

● Generator Self-Test:

When the mode selection knob is set to "1", the active power of one generator in the parallel generators in the power station is manually adjusted using the speed control switch on the distribution board to test the corresponding generator self-test function.

● Offline Self-Test:

For the YT-ZFP-1 model, positions "3", "4", "5", and "6" of the mode selection knob correspond to the device's "Acceleration", "Deceleration", "Load Transfer", and "Light Load" self-test functions, respectively.

For the YT-ZFP-2 model, positions "3", "4", "5", "6", and "7" of the mode selection knob correspond to the device's self-test functions of "Acceleration", "Deceleration", "Load Transfer", "Light Load", and "Reverse Power", respectively.

For the YT-ZFP-3 model, positions "3", "4", "5", "6", "8", and "9" of the mode selection knob correspond to the device's self-test functions of "Acceleration", "Deceleration", "Load Transfer", "Light Load", "Start", and "Stop", respectively.

Note: Undefined mode selection positions in each product model are reserved and not currently used; if the knob is placed in these positions, the device will not respond.

4. Measure the auxiliary output voltage (DC). This voltage corresponds to the required active power (P) of the generator. Measure the voltage between terminals 15 and 16 of the device, where terminal 15 is positive and terminal 16 is negative.

5. The generator speed can be adjusted using the "Adjust Speed" setting knob, with values ​​from 0 to 7 corresponding to fast generator speed adjustment. The generator load adjustment precision can be adjusted using the "Load Adjustment Precision" setting knob, with values ​​from 0 to 7 corresponding to high precision. The power station frequency adjustment precision can be adjusted using the "Frequency Adjustment Precision" setting knob, with values ​​from 0 to 7 corresponding to high precision.

Note: "Adjust Speed," "Load Adjustment Precision," and "Frequency Adjustment Precision" settings of "8" and "9" are reserved for temporary use. Setting the knob to "8" or "9" is equivalent to setting "0." After adjusting or changing the settings of all knobs, including "Adjust Speed," "Load Adjustment Precision," and "Frequency Adjustment Precision," the power supply to this device must be disconnected and then reconnected for the updated settings to take effect. In other words, the device needs to be powered on again after parameter changes.

6. By pressing the load transfer button switch on the external (distribution board), the device will automatically perform the load transfer function.

III. Physical Interface

It can be mounted using a 35mm DIN rail or a base for fixed installation. See Figure 3 for details.

IV. External Wiring

1. Terminal block arrangement: See Figures 19.1 to 19.3.

2. Reference wiring (Figure 19.4).

This wiring diagram only provides the basic wiring method for this device and is for reference only. Due to differences in systems and design methods, different designs can be implemented using this basic wiring method as a reference.