Primary Current Injection Test Set Factory Price Strong Current Generator
Introduction:
- SLQ series Primary Current Injection Test Set Factory Price Strong Current Generator is a sort of special equipment designed and manufactured for experimentation of electrics of power business as well as industrial and mining enterprises, and which is applicable to testing on current load and temperature increase of various switches, current transformers and other electric equipment.
- Separated/integral structure is adopted for this series of converter in light of different volume and weight, in addition, it's characterized as polar-less adjustment of output current, stable increase of current, large scope of load variation,reliable function, easy and safe operation and etc.
- Thus, it's ideal to adopt as current source equipment for current/temperature increase of industrial and mining equipment.
Specification:
| Type |
Capacity
(kva) |
Power supply |
Output |
Impedance voltage % |
Idle current % |
mode |
| I(A) |
V(V) |
I(A) |
V(V) |
| SLQ-5/500 |
3 |
13.6 |
220 |
500 |
5 |
>8 |
>6 |
single |
| SLQ -5/1000 |
5 |
22.7 |
220 |
1000 |
5 |
>8 |
>6 |
single |
| SLQ -10/2000 |
10 |
46 |
220 |
2000 |
5 |
>8 |
>6 |
Separated |
| SLQ -12/4000 |
12 |
30 |
400 |
2000/4000 |
6/3 |
>8 |
>6 |
Separated |
| SLQ -15/5000 |
15 |
37.5 |
400 |
2500/5000 |
6/3 |
>8 |
>6 |
Separated |
| SLQ -150/25kA |
150 |
375 |
400 |
25000 |
6 |
>8 |
>6 |
Separated |
The primary current injection method is commonly preferred for testing circuit breakers because it includes the current sensors, wiring, and the current conduction path in the test. However, this method has a drawback as it may not always detect problems related to sensor wiring and polarity.
This issue arises because the primary injection test is conducted on a single phase of the circuit breaker at a time, whereas the solid-state trip logic of the breaker processes signals from all three-phase sensors simultaneously. To identify problems related to sensors and wiring in circuit breakers, it is recommended to conduct the primary current injection test simultaneously on all three phases when testing solid-state trip units.
If conducting three-phase primary injection is not feasible, the sensors and wiring of the circuit breaker should be tested separately to ensure their proper functioning. The trip unit's functionality can be tested by performing primary current injection on one phase at a time. Additionally, two adjacent phases can be connected in series and tested as three pairs to check for current sensor polarity issues.
Since primary current injection testing can be relatively expensive, it is typically performed during the commissioning process to supplement periodic secondary-current testing programs. Circuit breakers that are part of critical processes or engineered safety systems often undergo maintenance testing using primary injection due to their high reliability requirements.
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