NR-610 Microcomputer Protection Device

Nanhong Electric NR-610 Microcomputer Protection Device

I Overview

1.1 Scope of Application

The NR-610 microcomputer protection device is suitable for small current grounding systems with voltage levels of 66kV and below. Based on a universal design concept with reasonable functional configuration, this product can be used for general protection of incoming lines, outgoing lines, plant transformers, motors, and capacitors.

II. Technical Parameters

2.1 Operating Environmental Conditions

Ambient temperature: -10 to +55°C

Relative humidity: Not exceeding 95%, no condensation

Atmospheric pressure: 80 to 110 kPa

Other conditions: The air around the device should not contain acidic, alkaline, corrosive, or explosive substances, and should have lightning, rain, and snow protection facilities.

Standard atmospheric conditions for testing:

Ambient temperature: +15 to +35°C

Relative humidity: 45% to 75%

Atmospheric pressure: 86 to 106 kPa

Storage and transportation: -25 to +70°C

2.2 Rated Electrical Parameters

Operating power supply: ADC 100 to 264V

Rated current: 5A

Frequency: 50Hz

2.3 Main Technical Specifications

2.3.1 Setting Range and Error:

Current protection setting range: 0.5~50A, error not exceeding ±3% or 0.05A

Setting step: 0.01A

Zero-sequence current setting range: 0.1~5A, error not exceeding ±3% or 0.02A

Setting step: 0.01A

Voltage setting range: 5~150V, error not exceeding ±3%

Setting step: 0.01V

Time setting range: 0.1~99.99s, error not exceeding ±1% or 35ms

Setting step: 0.01s

Inverse time constant setting range: 0.02-1.2

Time delay error not exceeding ±3% or 100ms

2.3.2 Current quick-break trip operation time: Not exceeding 35ms (at 1.5 times operating current)

Non-electrical protection trip operation time: Not exceeding 35ms

2.3.3 Device Power Consumption:

AC current circuit: Not exceeding 1VA/phase

AC voltage circuit: Not exceeding 1VA/phase

DC voltage circuit: During normal operation, not exceeding 10W

During protection operation, not exceeding 15W

2.3.4 Overload Capacity:

Current circuit: Can operate continuously at 2 times rated current

10 times rated current allowed for 10 seconds

20 times rated current allowed for 1 second

Voltage circuit: Can operate continuously at 1.2 times rated voltage

1.5 times rated voltage allowed for 10 seconds