Measurement and Control Device PS0U series of protection by the line protection, transformer protection, capacitor protection, reactor protection, standby power from the cast, composed of motor protection, can be used for 110kV and below voltage levels of various industrial and mining enterprises and power industry. By using a high-performance 32-bit CPU to integrate protection, measurement and control, and communication functions, it is suitable for substation integrated automatic systems or new energy power plant electrical automation systems. Devices can be installed Group centralized screen can also be directly installed in the switch cabinet to carry out decentralized control.

Technical Features

²Using the most popular high-speed processor, frequency up to 200 MHz, rich built-in resources, easy external circuit design, product manufacturing quality assurance and stability. Sufficient hardware resources, 8M bytes Flash Memory.

²Measuring three-phase current and zero-sequence current (Ia, Ib, Ic, I0), three-phase or line voltage (Uan, Ubn, Ucn, Uab, Ubc, Uca), active power P, reactive power Q, power factor cosφ, frequency f, meritorious electricity kWh, reactive power kVarh.

²The measured values of current, voltage, power, and electrical degrees not only reflect the fundamental wave, but also correctly reflect the 2~13th harmonic, and the frequency is 45~60HZ adaptive, so that the measurement results are consistent with the special measuring meter. 

²Along with DC 4 ~ 20mA analog output (can be customized for the current, voltage or power) to replace capture transmitter communicate.

²Up to 15-channel DI, users can customize the name.

²Way to protect the export of components through the tripping matrix setting, the convenience of users to select the relay action. Contact may choose to export all the relays for tripping contact (automatic return) or signal contact (after reversion back).

²Independent operating circuit which can adapt to the 0.5A~5A switch tripping and closing current, and the operating circuit is universal for AC and DC.

²GPS time synchronization can adopt the network time synchronization method, and also supports the B code time synchronization method (RS485 interface) and the SNTP method.

²Differential protection to prevent Device to start or outside the failure resulting in differential protection saturated TA maloperation criterion.

²Valid and reliable criterion disconnected TV effectively prevent low-voltage electrical components malfunction.

²Two 100M Ethernet communication interface, one RS485 communication interface, support the IEC61850, IEC60870-5-103, Modbus and other protocols.

²16 recorders, the largest recorded wave volume contains the 13-channel analog (interval 1mS). Wave was recorded using standard Comtrade format.

²The full graphical programming technology, as well as stable and reliable protection relay library, improve reliability and correctness of the procedure.

²Machine static low power consumption (about 6W), LCD module using the new technology, life expectancy increased substantially.

²High anti-interference performance, by 10 Electromagnetic Compatibility Testing & Certification, fast transients, electrostatic discharge, surge anti-interference performance are the highest grade (Ⅳ grade) standard.

²Working ambient temperature range: -25 ℃ ~ +55 ℃ (liquid crystal non-fuzzy, slow phenomenon).

Protection device type and configuration

2 Technical performance and indicators

2.1 Rated electric parameters

²Power supply

Operating Voltage:AC/DC 86~264V

Ripple coefficient:not larger than 5%

²Rated current, voltage

AC current:                               5A or 1A; (Specify when ordering)

AC Voltage:                             100V or 100V.

2.2 Principal technical indices

²Accurate operating range

Current:0.04In ~ 20In (In =5A or In =1A);

Voltage:1V ~ 150V;

Frequency:45Hz~60Hz

²Measuring accuracy

Voltage, Current:Class 0.2; (Including harmonics)

Power:Class 0.5; (Including harmonics)

Frequency：≤±0.01Hz;

4-20mA DC：Class 0.5. (Specify When Ordering)

²Setting error

Current components: ≤±2.5% setting value or ±0.01I_N;

Voltage components: ≤±2.5% setting value or ±0.005U_N;

Action time error: definite time protection, no more than (±1% setting value + 40)ms; inverse time limit protection, no more than ±5% setting value or ±40ms.

²Telesignalling resolution

Less than 2ms。

²GPS time-check

IRIG-B: DC Time Code, RS485 interface; NTP time-check: Ethernet interface.

²Contact capacity

Operation of circuit tripping current and closing current: 0.5A ~ 5A adaptive;AC/DC trip circuit self-adaptation.

Trip space contact: 5A (DC220V closure of capacity); signal space contact: 5A (DC220V closing capacity).

2.3 Environmental conditions

Ambient temperature:-25°C ~ +55°C

Relative humidity:5% ~95% (No condensation or freezing inside the product)

Atmospheric pressure:66Kpa ~ 106Kpa

2.4 Power consumption

AC current circuit:As I_N = 5A, not larger than 0.5VA each phase;

As I_N = 1A, not larger than 0.3VA each phase;

AC voltage circuit:At rated voltage, not larger 0.5VA each phase;

DC power supply circuit:For normal operation, not larger than 10W;

As the system operates, not larger than 20W.

2.5 Overload capability

AC current circuit: at 2 multiples of rated current, continuous operation; at 10 multiples of rated current, 10s is permitted; at 40 multiples of rated current, 1s is permitted.

AC voltage circuit: at 1.4 multiples of voltage, continuous operation 

2.6 Insulation performance

²Insulation resistance

Under normal test atmospheric conditions, the insulation resistance of the system between the externally leading active circuits and the open non-active metal parts as well as the housings and between the electrically unconnected circuits is measured by a 500V megger to be not lower than 100MΩ.

²Media strength

Under normal test atmospheric conditions, the system can tolerate the 50Hz, 1min. power frequency withstand voltage test and no breakthrough flashover and element damages will occur. During the test, as the voltage apply at any tested circuit, the other circuits will interconnect and ground equipotentially.

²Impulse voltage

Under normal test atmospheric conditions, such circuits as DC input circuit, AC input circuit, output contacts, etc. to ground and between the electrically unconnected circuits can tolerate the short-duration impulse voltage test of 1.2/50μs standard lightning waves and its open-circuit test voltage is 5kV.

2.7 Humid-heat tolerant performance

The system can tolerate the constant humid-heat test stipulated in GB/T7261.20. The test temperature is +40°C ±2°C, relative humidity, (93±3)% and test duration, 48h. Within 2h before the end of the test, the insulation resistance between the external lead live circuit part and the exposed non-live metal part and the shell, as well as the circuit without electrical connection should not be less than 1.5Mω; The dielectric strength shall not be less than 75% of the specified dielectric strength test voltage value.

2.8 EMC

2.9 Mechanical performance

PSM 691U Motor Differential And Integrated Protection 

MainFunctions：

Installation dimensions