Datakom DPR-350 Series, Руководство пользователя

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DPR-350 User Manual Ver_01 Firmware V-1.0
The DPR-350 offers the following parameters to configure protection functions:
PARAMETER DESCRIPTION VALID CURVES
Status Protection is activated or deactivated. All
Function Protection curve All
Direct. Direction setting for directional protection All
Set Val (Is) Fault threshold for current All
Time Dly (T) Constant time protection time DT
TMS (T) Time multiplier for IEC curves IEC-S, IEC-V, IEC-E, UK-LT, UK-
RC
Time Dial (T) Time multiplier for IEEE curves IEEE-M, IEEE-V, IEEE-E, US, US-
ST
K (K) Time multiplier for RI (electromechanical)
curve RI
DT Adder (C ) Additional delay time All except RI and IDG
Reset Ch Timer reset function if fault is dismissed IEEE-M, IEEE-V, IEEE-E, US, US-
ST
Reset Time Timer reset delay if fault is dismissed All
If any of the phase currents exceeds the configured threshold value, the function begins calculating the
trip time using the given parameters. This output trips the breaker at the end of the configured time,
according to constant time (DT) or variable inverse time (IDMT).
There are 2 levels of configuration parameters for overcurrent. This allows for configuring different trip
timers for different input currents. For example, level 1 (I>) can be used for overcurrent protection, while
level 2 (I>>) can be used for short circuit protection with sudden trip ( constant time (DT) and trip timer
set to 0).
The controller allows directional protection for overcurrent. It can be used for single directional protection,
or level 1 (I>) protection may be programmed for forward directional protection while level 2 (I>>) can be
configured for reverse directional protection.
The controller continuously measures the negative sequence current component and provides 2 levels of
optionally directional protection. Constant time (DT) and variable time (IDMT) protection curves identical
to the overcurrent protection are available.
Negative component protection provides protection from unbalanced loading. In particular, generators
can handle only a certain amount of unbalanced loading. Generators must be broken from the circuit in
case of an extreme unbalance. In case of unbalance, the symmetry of stator currents is broken and a
negative current component in the opposite direction begins to flow. These negative current components
cause extra heating along with mechanical problems such as rotor vibrations.
There are 2 levels of configuration parameters for negative component overcurrent. This allows for
configuring different trip timers for different input currents. For example, level 1 (I2>) protection may be
programmed for negative component overcurrent, while level 2 (I2>>) can be used for short circuit
protection with sudden trip (constant time (DT) and trip timer set to 0).
The controller allows directional protection for negative component overcurrent. It can be used for single
directional protection, or level 1 (I2>) protection can be programmed for forward directional protection
while level 2 (I2>>) can be configured for reverse directional protection.
10.3. OVERCURRENT PROTECTION (ANSI 50/51)
10.4. NEGATIVE SEQUENCE OVERCURRENT PROTECTION
(ANSI 46)