Product Introduction
The YT-ZFP-Ⅲ 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-Ⅲ Load Distributor (Frequency Control Load Adjustment 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 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.
Product Categories
| model | Function Description | Weight (kg) |
| YT-ZFP-1 | 1. Built-in power-frequency converter | 1kg |
| 2. Average Power Mode | ||
| 3. Light load detection | ||
| 4. Relay outputs: 1 acceleration + 1 deceleration + 1 trip + 1 load transfer indication | ||
| YT-ZFP-2 | 1. Built-in power-frequency converter | |
| 2. Average Power Mode | ||
| 3. Reverse power protection and light load detection | ||
| 4. Relay outputs: 1 acceleration + 1 deceleration + 1 light load + 1 trip + 1 load transfer indication + 1 reverse power | ||
| YT-ZFP-3 | 1. Built-in power-frequency converter | |
| 2. Average Power Mode | ||
| 3. Automatic start/stop output and light load detection | ||
| 4. Relay outputs: 1 Acceleration + 1 Deceleration + 1 Light Load + 1 Trip + 1 Load Transfer Indication + 1 Start + 1 Stop |
I. Technical Specifications
1. Input voltage: AC100V-220V-380V-440V, power consumption: <3VA
Input current: AC 0~5A, power consumption: <2VA
Input frequency: 50Hz or 60Hz
2. The load distributor can operate normally when the voltage change ΔU < ±10% and the frequency change Δf < ±5%.
3. When the load of the power station 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 load of the power station changes from no load to full load, the steady-state frequency of the power station can be maintained at 50Hz±0.5Hz (or 60Hz±0.5Hz).
5. It has a load transfer function, that is, it can accept the manual "load transfer" command (terminals 3# and 4#) and automatically transfer the load of the disconnected generator. When the load is transferred to within 10% of the rated power, it will automatically issue a trip command (29# and 30# passive NO).
6. It has a light load output function, and issues a light load signal (5#, 6# passive NO) when the load on the generator set is less than 10%.
7. Features reverse power output function (YT-ZFP-2 model only). When the generator set experiences 10% (or 15%) reverse power, this device will issue a reverse power signal (7#, 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.
8. Features start/stop output function (YT-ZFP-3 model only). When the load on the generator set is >80%, this device issues a start command to start the corresponding generator set; when the load on the generator set is <20%, the load distributor issues a stop command to stop the corresponding generator set. Both start and stop are passive changeover contacts 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)
Start-up: AC250V/8A; DC30V/8A (resistive load)
Shutdown: AC250V/8A; DC30V/8A (resistive load)
10. This device has a self-test function, that is, when the device is in self-test mode, it can check the device's acceleration, deceleration, and load transfer functions.
11. Environmental conditions: Ambient temperature is 0~55℃, relative humidity is 95%, and there is vibration, oil mist and salt spray during ship operation.
II. Instructions for Use
1. The device panel has one power switch and 6 to 8 indicator lights, namely power (POWER), acceleration (INCR), deceleration (DECR), circuit breaker opening (C/B), load transfer (UNLOAD), light load (LOW-P), reverse power (-P, YT-ZFP-2), start and stop (START, STOP, YT-ZFP-3), and 4 setting knobs, namely speed adjustment (Tn), load adjustment accuracy (△P), frequency adjustment accuracy (△f), and mode selection (MODE).
2. If the external wiring diagram is correct, the terminals for voltage Uac and current Ia and Ic should be consistent with the wiring markings on the device.
Note: When multiple generators are running in parallel, terminals #13 of each device must be connected to each other, and terminals #14 of each device must be connected to each other; the voltage between these two terminals corresponds to the average power (Pa) of the multiple generators.
3. Mode Selection:
a) When the device is working normally, it operates in "average power" mode (mode selection knob is turned to "0" position).
b) The device has a self-test function, which is divided into offline self-test (generator not connected) and on-line self-test (generator connected). During the self-test, the indicator lights of the corresponding functions of the device will light up, and the output relays will not operate.
●Installation self-test:
When the mode selection knob is set to "1", the active power of one of the parallel generators in the power station can be adjusted manually by using the speed control switch on the distribution board to test the self-test function of the corresponding generator.
●Offline self-test:
For the YT-ZFP-1 model, positions "3", "4", "5", and "6" on the mode selection knob correspond to the device's self-test functions of "acceleration", "deceleration", "load transfer", and "light load", respectively.
For the YT-ZFP-2 model, positions "3", "4", "5", "6", and "7" on 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" on 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 typ
e are reserved and not used for the time being; if the knob is placed in these positions, the device will not respond.
4. Measure the voltage (DC) of the auxiliary output, which corresponds to the active power (P) required for power generation. That is, measure the voltage between terminals 15 and 16 of the measuring device, where terminal 15 is the positive terminal and terminal 16 is the negative terminal.
5. The generator speed can be adjusted using the "Adjust Speed" setting knob, with 0 to 7 corresponding to fast generator speed adjustment; the generator load adjustment accuracy can be adjusted using the "Load Adjustment Accuracy" setting knob, with 0 to 7 corresponding to high adjustment accuracy; the power station frequency adjustment accuracy can be adjusted using the "Frequency Adjustment Accuracy" setting knob, with 0 to 7 corresponding to high adjustment accuracy.
Note: The settings "8" and "9" for "Adjust Speed," "Load Adjustment Accuracy," and "Frequency Adjustment Accuracy" are reserved for temporary use. If the knob is set to "8" or "9," it is equivalent to setting "0." After adjusting or changing the settings of all knobs for "Adjust Speed," "Load Adjustment Accuracy," and "Frequency Adjustment Accuracy," the power supply to this device must be disconnected and then reconnected. Only then will the updated settings take effect. In other words, this 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 installed using a 35mm guide rail or a base, as shown in Figure 3.
IV. External Wiring
1. The wiring terminal arrangement is shown in Figures 19.1 to 19.3.
2. Reference route (Figure 19.4).
This wiring diagram provides only 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 diagram as a reference.
