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

PSL691U LineProtectionAndControl Device

MainFunctions：

Principle Descriptions

3-zone composite voltage overcurrent protection
As any phase current is higher than the setting, the protection will trip after a time delay. 3-zone overcurrent protection control words may be represented by an independent selection inputs or exit, whether by the composite voltage required to start, whether the band direction.
When the selection by the composite voltage startup: Ia by Uab, Uca or negative sequence voltage startup, Ia current by Uab, Ubc or negative sequence voltage startup, Ic by Ubc, Uca or negative sequence voltage start.
With the direction element: Ia and Ubc component A phase of the direction, Ib and Uca component B phase of the direction, Ic and Uab component C phase of the direction. When the relative current and voltage phase angle (-30 ° ~ +90 °), for the positive direction. Directional
element with memory function to eliminate the direction of the proximal three-phase short-circuit component die area.
When the device detected Bus TV disconnected, the device automatically by repressing start or quit with the direction of the overcurrent protection, for there was no compound-voltage start-up and not with the direction of the net impact of over-current protection from the TV disconnected.

 3-zone directional Zero-sequence overcurrent protection
When a system uses a low resistance grounded approach, such as greater than 3I0 value by delay, zero-sequence I and II above tripping, zero-sequence Ⅲ zone selection control word may be tripping or alarm.
To consider such as with the direction of three has become the direction of zero-sequence overcurrent protection paragraph.
When 3U0 relative phase angle and 3I0 for (-75 ° ~ -195 °), the think are the positive direction.
Zero-sequence voltage 3U0 from protecting its own, that is, 3U0 = Ua + Ub + Uc. When 3U0 <2V automatically locking the direction of zero-sequence overcurrent protection.
Zero-sequence current 3I0 from protecting its own, taking three-phase currents and to protect, that is, 3I0 = Ia + Ib + Ic.
When the device detected Bus TV disconnected, the device automatically locking the direction of zero-sequence overcurrent protection. Who are not with the direction of flow of the zero-sequence protection from the impact of TV disconnected.
 Overload protection
As any phase current is higher than the setting, the protection will alarm after a time delay.
 Autoreclosing
When reclosing function input and switches at close status and 15 seconds, not energy storage spring contact disconnect when three conditions are met, reclosing Charging completed (ie Reclosing ready, could be coincidence). Reclosing charge after the completion of running lights blinking, if reclosing is not ready to run long bright lights will not flicker.
Reclosing charging is completed, once the protection of tripping or switch steal jump, after reclosing delay, Reclosing start.
Reclosing after, according to cast back seized without selection pressure, seized or not seized in the same period.
a) seized over the same period Reclosing conditions: | ∠ Ux - ∠ Uab - ∠φ | ≤ seized close angle over the same period .
Note: ∠ Ux angle for the line voltage;
∠ Uab UAB for the bus voltage angle;
∠φ for normal circumstances, because of different phase or system wiring caused Ux UAB advance angle.
b) non-pressure seizure Reclosing conditions: Ux ≤ seized without pressure value.
If Ux seized more than non-pressure setting, then automatically be converted to the same period Reclosing seized.
a) do not seized Reclosing: Ux not determine the amplitude or phase angle, direct reclosure. After reclosing If it can not be completed within 10S Reclosing, then automatically the end of the reclosing.
When manually tripping, remote tripping, overload, low-cycle or low-voltage load shedding oad shedding actions, the automatic reclosing feature atresia.
 Manual closing synchro-check
When the relationship between Ux and Uab Satisfied Reclosing conditions over the same period and seized the hands together in the same period, the device 4X19, 4X21 contact closure, the user can be 4X19, 4X21 series access point manually switch loop, you can achieve manually Reclosing seized over the same period.
 Closing Post-acceleration overcurrent protection
When the manual switch, remote control switch or reclosing action, if encountered failure, for fast removal of a fault protection device has accelerated. The protection monitoring switch from trip status into close status together after 3 seconds of current, such as greater than any one phase current value, after a short delay, the device tripping. 3 seconds after the exit post-accelerated protection automatically.
 Low frequency load shedding
When the system is lower than the frequency value by delay, the device tripping. Low-frequency load shedding function with undervoltage blocking, or slip locking function to prevent low-cycle load shedding maloperation.
Criterion for low-voltage latch-up: Uab, Ubc, Uca were lower than the low-voltage lock closure value, low-cycle load shedding atresia.
Criterion for slip atresia: Δf / Δt is greater than slip lock closure value, low-cycle load shedding atresia.
 Undervoltage load shedding
When the three line voltage were lower than the set value, by the delay, the device tripping.
Any of the following conditions for the establishment of low-voltage load shedding will latch functions:
a) any line voltage <30V
b) ΔU / Δt> closed lock voltage rate of change value, ΔU / Δt for the second term changes in the value of line voltage. When the line voltage below the set value, the voltage change rate. When the line voltage is greater than set value, the voltage rate of change of real-time updates.
c) both three-phase current <0.1In.
d) switching at jump-bit
e) TV disconnected
f) negative sequence voltage greater than 5V
 Lower current ground wire selection
When a system neutral grounding or Petersen-coil grounded by the device and the main station together small current grounding line selection function.
When the system single-phase ground fault occurred, the devices determine the circuit breaker in the combined digital and 3U0 greater than 10V, the more limited 3U0 generate alarms. Master station detects 3U0 more limited after the alarm, access to the device records 3U0, 3I0 sampling, calculated strategy to give access locations.
 TV disconnection alarm
Device using two methods to identify TV disconnected.
Method 1: When the three line voltage in the difference between the maximum and minimum is greater than 30V, delay 3S, sending TV disconnected signal; when the three line voltage in the difference between the maximum and minimum is less than 30V, and Uab is greater than 80V, TV Disconnect the signal back.
Method II: mutations in voltage-current non-mutation at the same time that TV line, send line
TV signal.
Voltage mutation: 100ms within any of the three line voltage from 90V to less than 60V.
Current non-mutation: Ia, Ic are larger than 0.2A, and the change is less than 0.1A.
The three line voltage greater than 90V, TV disconnected signal back

Installation dimensions