Nanzi PSM642UX Motor Integrated protection device
1.2 Main features
Rich resources and complete functions: high-precision real-time clock system, supporting RS485 IRIG-B GPS time synchronization; Flexible networking mode and
Protocol configuration; It can provide complete protection, measurement and control functions.
Mature technology and high reliability: apply the high voltage protection technology and idea of Guodian Nanzi International * * * to the low voltage protection, and the protection principle
Advanced and reliable, more professional; The EMC level of product hardware meets the national standard.
Flexible configuration and strong pertinence: the device plug-in configuration is simple and easy to use, and the outlet can be flexibly configured, which facilitates various application requirements on the site; to the full
Consider the characteristics of iron and steel metallurgical enterprises.
Powerful communication and integrated recording: provide dual Ethernet communication ports or dual RS-485 communication ports, and support IEC60870-5-103 communication protocol
Communication protocol with IEC 61850 (optional); It can query at least 100 trip records, 200 self inspection records, and later 200 times switch Quantity and
State displacement recording, integrated recording of device operation information; It can record 8~100 reports and displacement mark sets.
1.2 Device model and protection function configuration
a) Overcurrent and overload protection
b) Grounding protection
c) Open phase operation protection
d) Overheating protection
e) Long start and locked rotor protection
f) Low voltage and overvoltage protection
g) Non electric quantity protection
h) F-C locking function
1.3 Measurement and control
a) Current, voltage, power, power factor and other measurements
b) 14 channels of external switching value input remote signal acquisition (larger 20 channels are optional)
c) Circuit breaker position, manual opening and accident remote signaling
d) Remote opening and closing of normal circuit breaker
e) GPS time synchronization input
2 Protection function and principle
2.1 Motor starting
When the control word KG2.14=0, the starting time of the motor judged by the device is Min (Tstart, Tstart0), where Tstart is the actual time of this time
Starting time refers to the time when the large phase current starts to count from zero jump to 10% In (T0) until the current drops to 120% In after exceeding the peak value
(In is the rated current of the motor, the same as below) The time of this process until the time; Tstart0 is "fixed value of motor starting time",
It indicates the time from zero to rated speed of the motor, which can be set to 1.2 times the longer starting time of the motor.
When the control word KG2.14=1, the starting time of the motor judged by the device is fixed as Tstart0, and the starting point of timing is T0.
The device connects the rear soft pressing plate on the panel lamp (Green LED light) is defined as the motor start time indicator light, which is long during motor start
On, so as to visually indicate the starting process of the motor.
If the motor is started for too long, the rotor will heat up and endanger the normal operation of the motor. Long start time protection function can be enabled through soft strap
Enter or exit. This protection is only used when the motor is started. During starting, if the current of any phase is greater than the setting current for a long time
The dynamic protection acts at the exit, and the action indicator light is the signal light (red LED light) at the back of the panel. After the motor starts, protect
Auto exit.
