Description

Technical Parameters

Product Overview & Applications

Product Overview

HMSLQ-500A box-type Primary Current Injection is a necessary equipment for high-current field in electrical test, which is used in power plant, distribution substation, electrical equipment manufacturing, scientific research, laboratory and other units. It belong to short or intermittent working system, in small size, light weight, good performance, easy to use and maintenance .

Industrial Application:

1.Electrical Power System Commissioning：Circuit Breaker Testing;Protection Relay Calibration;Switchgear Testing;Quality Assurance.
2.Preventive Maintenance Programs：Periodic Testing：
Manufacturing plants
Commercial buildings
Hospitals and data centers
Water treatment facilities
3.Troubleshooting and Fault Finding：Nuisance Tripping Investigation;Protection System Analysis;Failure Analysis;Commissioning Verification
4.Specific Industry Applications：Manufacturing and Industrial Plants;Power Distribution and Utilities;Building Services.

Key Features & Advantages

1.High Current Performance

500A DC Output;Stable Current Regulation;Multi-Range Design.

2. Structural Design
Compact Enclosure: Rugged, portable case with carrying handle
Integrated Components: All elements (transformers, control units, meters) housed in a single unit
Heavy-Duty Connections: High-current terminals and robust cables engineered for 500A applications
Forced Air Cooling: Built-in fan cooling system supports sustained high-current operation

3. Control and Measurement
Digital Display: Clear readout of output current and voltage
Precision Shunt: Accurate current measurement system
Timing Function: Built-in timer for trip time measurement
Remote Operation Capability: Optional remote control functionality

4. Safety Features
Overcurrent Protection: Automatic power cutoff when current exceeds limits
Thermal Protection: Temperature monitoring with automatic shutdown
Emergency Stop: Prominent emergency stop button
Insulated Enclosure: Full electrical isolation ensures operational safety

Operating Conditions

1. Environmental Conditions

Temperature Range:-10°C to +50°C (operating)

Storage Temperature:-20°C to +70°C

Relative Humidity:<80% (non-condensing)

Altitude:Up to 2000 meters above sea level

Indoor Use:Designed for indoor or sheltered outdoor use

Ventilation:Ensure adequate airflow around the unit, especially during high-current operations

2. Power Supply Requirements

Input Voltage:220VAC ±10% or 110VAC ±10% (as per model)

Frequency:50/60 Hz

Power Rating:Typically 3-5 kVA depending on model

Connection:Properly grounded electrical outlet

Stability:Stable power supply without significant fluctuations

Additional Information

1. Primary Test Leads and Cables

Heavy-Duty Test Leads (2 sets):

500A capacity, flexible copper cable

Length: Typically 1.5-2 meters each

Heat-resistant insulation (up to 105°C)

High-Current Clamps (4 pieces):

Spring-loaded crocodile/clip clamps

Copper jaws with serrated teeth for good contact

Insulated handles for safety

2. Connection Accessories

Bus Bar Connectors (2 sets):

For direct connection to switchgear bus bars

Multiple hole sizes (8mm, 10mm, 12mm)

Cable Lugs (assorted):

Various sizes for different cable diameters

Copper construction with tin plating

3. Measurement and Monitoring Accessories

Precision Shunt (optional built-in or external):

500A/100mV or 500A/1V rating

Accuracy class 0.5 or better

Voltage Measurement Probes (2 pieces):

Insulated test probes

1000V rating with safety caps

4. Control and Interface Accessories

Remote Control Unit (if applicable):

Wired remote start/stop control

5-10 meter cable length

Digital Display Unit (for basic models):

LCD/LED display for current reading

Protective cover or case

5. Safety Accessories

Insulating Mat (1 piece):

Minimum 1000V rating

Size approximately 1m x 1m

FAQs

Q:What is this tester used for?

A: It is used to test and verify the performance of electrical protection devices like circuit breakers, fuses, and relays by injecting a high, stable current directly (primarily) through them. This checks if they trip at the correct current and within the specified time.

Q: Why is 500A a common rating?

A: 500A is sufficient to test the trip characteristics (especially long-time and short-time delays) of a wide range of common low-voltage power circuit breakers (LVPCBs) and molded case circuit breakers (MCCBs) found in commercial and industrial settings.

Q: What is the advantage of the "Box Type" design?

A: The box type design is highly portable and self-contained. All components (transformer, controls, meters) are integrated into a single, rugged case, making it ideal for field service technicians who need to move between different sites or panels.

Q: What specific equipment can I test with a 500A set?

A: You can test:

Molded Case Circuit Breakers (MCCBs) up to approx. 400A

Insulated Case Circuit Breakers (ICCBs)

Thermal-magnetic and electronic trip units

Fuses and fusible switches

Overload relays

Q: Can it test the instantaneous trip function of a large breaker?

A: Typically, no.The instantaneous trip of a large breaker may require thousands of amps for a fraction of a second. A 500A set is designed for sustained current to test time-delayed functions. Testing instantaneous trips requires a specialized, high-pulse unit.

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