Applications:
Induced overvoltage withstand test set, also called induced voltage induced frequency test set, Double voltage & double frequency test set, DVDF motor generator test, Motor generator tests, or High frequency generator.
The test set provides a continuously variable output voltage at double or Three times frequency to test transformer insulation performance between turns of coils, layer to layer.
Model DVDF 50 series test set suit for capacity ≤ 5000kVA Transformer.
The set consists of:
3-phase squirrel cage asynchronous motor, rated frequency, 50Hz, one piece
3-phase synchronous generator, rated frequency, 100Hz or 150Hz or 200Hz, one piece
Control module function: Motor start up device, generator parameters display, generator exciting adjust and exciting parameters display, generator protection. etc.
Control module has two choice. Alternative for control console or control panel. With the same function and difference in shape. Refer to photos as below.
The motor and generator are positioned on the same one pedestal, and connected with steel couples. The exciting system is integrated into the generator.
Working Principle:
While this motor drives the synchronous generator up to rated rotate speed, input exciting current (DC) to the generator winds of rotor. Since generator's rotor is running, therefore, the generator will output electricity. Output voltage change with exciting current.
How connection:
An alternating voltage of sine wave form (as much as possible) at double or three times frequency (100 Hz or 150Hz or 200Hz) and double voltage in amplitude is applied at one side of the transformer under test while the windings, which are not connected to the source of excitation, are left on open circuit. This higher frequency is considered to avoid excessive excitation current during the testing.
Product Features:
DC no-carbon-brush excitation.
Output: Constant frequency(100Hz or 150Hz or 200Hz), variable voltage(80-800V)
Digital Display: Output Current( three phase), Output Voltage, Output Frequency
Input Current, Input Voltage, Exciting current, Exciting Voltage Time
Indication: Power, zero, Open/Close. etc
Buttons: Power Start, voltage up, voltage down, etc
Test duration can be preset by time controller.
The exciting system is integrated into the generator
Connection Type: Delta
Start up mode for motor: Star-delta
Direction of the motor: Should be clockwise.
Protection against over load, over heat provided. Zero Protection
Specifications
Input to motor: 380V, 50Hz,
Output Voltage: 80-800VAC
Output Frequency: 100, 150, or 200Hz( Each one model, each one frequency)
Rated output current: About 36.8A
Rated exciting current < 1 A, Rated exciting voltage< 100VDC, subject to load.
Capacity: 50kVA
Suitable for induced over voltage withstand test of transformer
PF: 0.5(lag)
Insulation Level: H
Outlet: 6 Terminals out
Wave Aberration Rate at No load state≤ 3%
L-L Voltage unbalance rate(The cold and hot state)≤ 2%
Operation Mode: Continuous within 2 hours
Over voltage: 130% rated voltage, 3 minutes
Insulation Level: F
Size and Weight
Motor-Generator set: 1300mmL× 550mmW × 650mmH, Weight: 1500Kg
Control panel: 800 mmLX800 mmWX1200 mmH, 120Kg
Temp: -15-40C
RH< 90%
Altitude< 1000meters
Order Information:
Motor and its generator, all same one
Control module, alternative panel or console style. Same Price
Different Price for Different Models
Model DVDF50 A, Output Frequency 100Hz
Model DVDF50 B, Output Frequency 150Hz
Model DVDF50 C, Output Frequency 200Hz
1. APT Business Scope
ATP Power Technology Co., Ltd., Xi'an( briefed APT), is one subsidiary of NWEPC Group China, located at Xi'an Hi-Tech Develop Zone, China, mainly engaged itself in following business:
Research & Development for products of electrical test & measure;
Manufacturing for products of electrical test & measure;
Provide Solutions for Electrical Test in the field of Transformer, CB, Cables and Generators, etc.
Provide Electrical Test Equipment, such as Primary Current Injection Test Set, Secondary Injection Test Set, Hipot test set for AC/DC withstand Test Set, etc.
Provide Electrical Measure Instrument, such as TTR, Transformer Ohmmeter, High Insulation Resistance Test, DLRO, C & DF, Earth Resistance Tester, Oil Tester, Vacuum Bottler Tester, etc.
Provide customer site service if necessary.
2. APT Advantages
We can discuss all kinds of technical issues with customers in English clearly;
We can provide solid quality products & technical service with competitive price;
We focus on each details so that our customer can operate the instrument easily
We can provide product according to customer made;
3. APT Quality Promise
100% factory test. Only factory test passed, its delivery can be permitted;
All function and parameter are equivalent to or better than contract specifications specified.
The standard for product design and production, equivalent to or better than International Standard
4. APT Service Promise
Free technical support for our products
Free maintenance for our products within guarantee term
Customer site service at cost price
All we do to satisfy our customers;
5. APT Perspective
Export the best Chinese products and service to the world;
APT will be one company both service and application oriented;
Help our customer success, growing together with our customers.
