5000a Three Phase Primary Current Injection Test Set For
Temperature rise testing
TEST-905 5000a Three Phase Primary Current Injection Test Set For
Temperature rise testing
Primary current injection testing is utilised in high current/high
voltage scenarios found at large electrical installations such as
substations. A large current (between 100A and 20,000A depending on
system specifications and test requirements) is injected directly
on the primary side of the electrical system such as a circuit
breaker. The objective of the test is to identify how the system
operates under various levels of current load.
Primary injection testing is suitable for testing over-current trip
relays attached to a circuit breaker. By injecting the current into
the system we can measure if the breaker will trip or fail, and how
long the current is live before the circuit is broken.
Circuit breakers can go long periods of time without activation,
and failure at the moment of activation can cause catastrophic
damage to the electrical system. Circuit breaker testing with
primary current injection on a breaker that has not triggered in
some time is the best way to recreate the real operating conditions
of a current spike.
TEST-905 5000A primary current injection test equipment adopts ARM
Chip to control its output process and large capacity of toroidal
transformers. It is equipped with LCD display and current meter; it
can show primary current value, second current value, turn ratio
and the action time. Packing is used as aluminum alloy body with PC
panel. TEST-905 is mainly applied to CT turn ratio testing in the
power system and contact resistance test which need large current.
and CT , circuit breaker, Switch temperature rise testing.
This powerful test system is designed for primary injection testing
of protective relay equipment and circuit breakers. It is also used
to test the turns ratio of current transformers and for other
applications that require high variable currents.
The system consists of a control unit and a current unit. The two
parts are portable, and INGVAR can be quickly assembled and
connected.
The control unit has many advanced features – a powerful
measurement section for example, that can display turns ratio as
well as time, voltage and current. A second measurement channel can
be used to test an additional current or voltage. Current
transformer turns ratio, impedance, power, power factor (cos φ) and
phase angle are calculated and shown in the display. Current and
voltage can be presented as percentages of nominal value. The
fast-acting hold function freezes short-duration readings on the
digital display when the voltage or contact signal arrives at the
stop input, the object under test interrupts the current or
injection is stopped.
The TEST-905 is a programmable AC high-current source designed specifically for
utility-substation applications. This device is well suited for
primary injection testing of protective relays. This versatile
device can also be used for testing thermal, magnetic, and
solid-state motor-protection relays and molded-case
circuit-breakers, as well as any application that requires a
high-current source.
Built-in Timer
The TEST-905’s built-in timer can test the time delay
characteristics of protection relays and molded-case
circuit-breakers. Once the test is initiated, the current source
and the timer are automatically turned on at the next zero crossing
point of the AC. The timer stops when the TEST-905 input detects a change in the dry contact or voltage input, or
detects the removal of the test current. The test results are then
displayed in milli-seconds and fractions of a cycle(s) on the
unit’s back-lit LCD screen (20 characters by 4 lines).
External Current Input
The TEST-905 also has an external-current input (0 – 6 A). Both the internal
current source amplitude and the external current source
measurement readings can be viewed at the same time.
FEATURES
- Most advanced primary current injection test system to simplify all
types of switchgear and CT commissioning, ground grid, circuit
breaker testing and more
- Modular design to permit optimal user configuration of output
current vs. unit size
- Compact transport cart facilitates portability into switchgear
rooms with limited space
- Unique I/30 function allows the current to be pre-set using low
current to prevent test sample heating, thus eliminating corruption
of test result
PARAMETERS
| Electrical parameters |
|---|
| Accuracy | ±0.5% |
| Power Supply(AC) | 220V±10%·25A, 50Hz/60Hz or
110V±10%·50A, 50Hz/60Hz |
| Current Output (AC) | 5000A·5V or 2500A·10V |
| Capacity | 25KVA |
| The current output waveform distortion | ≤5% |
| Dual protection | overload electronic protection and software protection |
| Primary current |
|---|
| Range | 0-5500A |
| Resolution | 0.1A |
| Accuracy | <0.5% |
| Secondary measurement |
|---|
| Range | 0-6A |
| Resolution | 0.001A |
| Accuracy | <0.5% |
| Current duration |
|---|
| 5000A range | 5000A Continued
2500A Continued |
| 2500A range | 2500A Continued |
| With timer |
|---|
| Range | 0.0001～999.99S |
| Resolution | 0.001S |
| Accuracy | <0.5%±5 words |
| Mechanical parameters |
|---|
| Dimensions (W×D×H) (mm) | 830×1260×2000 |
| Weight(kg) | 650 |
| Environmental conditions |
|---|
| Temperature | -10°C to 40°C |
| Relative humidity | ≤80% |
SELECTION GUIDE
| Model | ACCU
RACY | Primary
current | AMMETER
(0-6A) | TIMER | POWER | INJECTION CURRENT TIME | DIMENSION(W×D×H)(mm) | WEIGHT | REMARK |
|---|
| TEST-901 | 0.5% | 0-1100A | YES | YES | 5KVA | 1000A: 2-3min;
500A:3-6min | 430×260×260 | 25KG | Integrated structure |
| TEST-902 | 0.5% | 0-2200A | YES | OPTIONAL | 12KVA | 2000A:2-3min;
1000A:3-6min | 360×300×295 and 320×300×300 | 35KG+15KG | Fission structure |
| TEST-903 | 0.5% | 0-3300A | YES | OPTIONAL | 15KVA | 3000A:2-3min;
1500A:3-6min | 380×350×360 and 340×290×420 | 48KG+42KG | Fission structure |
| TEST-905 | 0.5% | 0-5500A | YES | OPTIONAL | 25KVA | 5000A:2-3min;
2500A:3-6min | 430×430×445 and 550×450×600 | 68KG+55KG | Fission structure |
