1. General

The THT-APS arc light integrated protection system (time of removing failure is 60~70ms) realizes 60ms actuation time compared with that of traditional protection actuation, which effectively restricts the arc light failure in the initial stage.

2. This product is mainly applied to:

2.1 Bus protection in the medium and low voltage switchgear of various power stations, transformer substations, distribution substations and box-type substations systems.

2.2 Connector in the cable chamber of the feeder cabinet, and breaker cabinet protection;

2.3 Rectification cabinet protection;

2.4 Other equipment with easy occurrence of arc light, such as high voltage electrical machine junction box protection.

3. Product Composition

THT-APS-MU Primary Unit

THT-APS-AC Arc Collection Unit

THT-APS-FU Feeder Protection Unit

THT-APS-AS Arc sensor

THT-APS-EC Optical fiber

4. Product Characteristics

4.1 The primary unit can carry 16-way arc sensor independently

4.2 Equipped with an independent background system;

4.3 Optical looped network design

4.4 Functions of failure recording, failure location and current measurement;

4.5 Large screen liquid crystal display

4.6 Arc signal realizes serial transmission among collection units to arbitrarily add quantity of monitoring points;

4.7 The primary unit and the collection unit share dual-connection concerning optical fiber and communication

4.8 Computing time is shorter than 208μs;

4.9 Key components adopt imported high-quality products;

4.10 Passed electro-magnetic compatibility with the severity grade of IV;

4.11 The arc sensor realizes passive connection with the primary device via optical fiber, with strong electric isolation and capacity of anti-interference.

4.12 Alloy shell design with light weight is more effective to shield external electro-magnetic interference.

4.13 Actuation criterion can be set in two actuations, one is dual actuation with arc and over current, and the other is single arc actuation, synchronism of the actuation port can be set in terms of demand;

5. Primary Technical Parameters

Device power supply

Rated voltage: AC85-265V/DC110-360V

Device power consumption: 5W

Output contact capacity: AC250V 8A/DC30V5A

Ambient temperature

Allowable operating temperature/storage temperature:-20°C-- +55°C/-25°C --+70°C

Actuation time

Device output time: <4ms

Arc light detection range: 100Lux--500Klux

Electromagnetic compatibility indicator

Electrostatic discharge noise immunity: ±15kV

RF electromagnetic field radiation noise immunity: 80MHz--lGHz 10V/m

Electric rapid transient pulse group noise immunity: 4kV/2.5kHz

Surge noise immunity: wire-ground ±4kV; wire-wire ±2kV

RF transmission noise immunity:150kHz--80MHz; level: 10V

Power frequency magnetic field noise immunity: continuous magnetic field 100A/m, short-time magnetic field 300A/m, V grade

Pulsed magnet field noise immunity: 300A/m

Damped oscillation magnetic field noise immunity: 30A/m, VI grade

Voltage sag, short-time interruption and voltage variation noise immunity: voltage sag and short-time interruption: 0% UT; voltage variation: 40% UT

Oscillatory wave noise immunity: 100kHz 1MHz; common module: 2.5kV; difference module: 1kV

Power frequency noise immunity: A grade; difference module: 150V; common module: 300V;

Conducted emission limit: 150kHz--30MHz

Radiated emission limit: 30MHz--1GHz <57uV/m

Harmonic current emission limit: A grade, 15 times harmonic wave

Voltage fluctuation and flicker: fit IEC61000-3-3

AC circuit

Rated current: 1A/5A

Rated frequency: 45~65Hz

Watt consumption: <5VA

Actuation setting

Phase current: 0.5--10In

Accuracy: ±5%

Communication: RS485 Modbus RTU

6. Overall Dimension and Installation Opening Hole 

Note: Overall dimension and installation dimension as well as installation opening hole of THT-APS-MU,THT-APS-AC and THT-APS-FU are the same. Take the THT-APS-MU for example.

The primary unit and the collection unit are connected by cable and optical fiber. Pay attention to threading hole of the spanning screen wiring in design. Current collections can realize cascade.

7. Ordering Instruction

7.1 Bus type arc protection:

Quantity of switch cabinets;

Quantity of incoming cabinets;

Rated input current of the device, namely, the secondary input is 1A or 5A.

Primary system diagram

7.2 Feeder type arc protection:

Quantity of coil-out to be protected;

Rated input current of the device, namely, the secondary input is 1A or 5A.

Primary system diagram

In case of particular demands, allocation can be conducted in terms of physical truth; if the independent background system can be provided, offer instruction