Functional characteristics
■Telemetry function: acquisition of single-phase AC voltage, acquisition of three-phase current, acquisition of zero sequence current;
■Telemetry function: acquisition switch position signal, acquisition switch energy storage state, acquisition operation knob state;
■Remote control function: support the opening and closing operation of local manual control button on the switch, and support the opening and closing operation of remote communication mode on the switch;
■Current protection function: over current protection, zero sequence current protection;
■Remote communication function: support RS232 / RS485 communication, GPRS network communication function, DL / t101-2002 balanced or unbalanced communication protocol;
■Local maintenance function: terminal self diagnosis and self recovery function; knob setting protection setting; operation, network, fault and other status indicators; local debugging RS232 interface to realize data query, parameter setting and other functions;
nData storage function: SOS data storage; operation record storage; fault record storage.
technical parameterRated data
Working voltage: AC220V
Remote signaling voltage: DC24V；
AC voltage: 220V；
Frequency: 50Hz；
error：± 20% 。
Power consumption
AC voltage: < 0.5va/phase；
AC current: < 0.5va/phase；
Power consumption of the whole machine: under non communication state ≤ 18va under communication state ≤ 40VA
Overload capacity
AC voltage: 2 times of rated voltage: continuous operation；
AC current: 2 times of rated current: continuous operation；
10 times rated current: 10 seconds。
20 times rated current: 1 second。
Main technical indicators
AC sampling
Voltage input nominal value: 220V / 100V。
Current input nominal value: 5A / 1A。
AC voltage and current sampling accuracy: class 0.5。
Sampling accuracy of active power, reactive power and power factor: class 1.0。
At the nominal input value, the power consumption of each circuit is less than 0.25va。
Within the specified nominal value range, the linear error shall not exceed ± 0.5%.
The short-term excessive AC input current applies 2000% of the nominal value (the nominal value is 5a), the duration is less than 1s, and the system works normally.200% of nominal value of short-term excessive AC input voltage applied (nominal value is 100V)。
Teleoperation
Signal input mode: passive contact.
The input circuit adopts photoelectric isolation.
Contact voltage: DC24V.
SOE resolution is less than 2 ms.
In case of an accident, the transmission time of remote signal displacement is less than 1 second.
Software anti jitter time 0-60000 MS can be set.
Remote output
Output mode: relay normally open contact.
Contact capacity: AC250V, 16a; dc30v, 16a.
Pulse input characteristics.
The input circuit adopts photoelectric isolation.
Pulse width > 10ms.
Interface level: (0 —— 24) v.
The error is no more than ± 1 pulse.
Power Supply
Main power supply of distribution automation terminal: AC 220V, allowable deviation - 20% —— + 20%; with automatic switching function of two-way AC power supply;
Terminal standby power supply: lithium battery (DC24V, battery capacity ≥ 14Ah);
Maintain normal operation for more than 14 hours after AC power loss;
Output voltage / power of switching operation power supply: + 24V, 450W for a short time (within 3 —— 5S when the load is connected to the switch);
The power consumption of the whole terminal is less than 10W.
In linear range, the total error of fault current is not more than ± 3%. Integral electric degree ≤± 1%