goshenelectric

The PSM-E01 monitoring system consists of the PSM-E01 power control unit (PCU) and the monitoring circuits built in rectifiers. The PCU has inbuilt detection circuit to detect the bus-ground voltage. It also can connect to an insulation relay and a battery detector that outputs the fault information by relay contact.

PSM-E01 monitoring system is designed mainly for cooperating partner to build a small capacity EP system used in 35kV or below substations. With rectifiers, this monitoring system can fulfill intelligent battery management, EP system detection and alarm functions. It can report operating data to a remote monitoring system with Modbus or CDT91 protocols, which enables the EP system to be used in an unattended substation.

PSM-E01 Detected analog signals

SN	Name	Quantity	Input range	Display range	Error*	Remark
1	AC voltage	1	0 ~ 2Vac standard signal	0 ~ 500V	± 2% rated value	Used with Emerson AC voltage sampling board (AVSB) A14A3S1
2	Bus voltage	1	0 ~ 320Vdc	0 ~ 320V	± 0.5% rated value
3	Battery string voltage	1	0 ~ 320Vdc	0 ~ 320V	± 0.5% rated value
4	Load current	1	0 ~ 75mVdc	0 ~ 1500A	± 0.5% rated value	Used with shunt
5	Battery current	1	-75mVdc ~ +75mVdc	-1500A ~ +1500A	± 0.5% rated value
6	Battery ambient temperature	1	250uA ~ 330uA current	-15°C ~ +50°C	± 2°C	Used with Emerson temperature sensor
7	Positive bus -/ netagtive bus - ground voltage	1	0 ~ 320Vdc	0 ~ 320Vdc	± 2% rated value	Should use the inbuilt insulation detection function of PSM-E01 PCU
*: Sampling error of PSM-E01 PCU only excluding the error of transducer or AVSB

PSM-E01 Detected digital signals

SN	Name	Status	Features	Remark
1	Output air breaker status	NC	All signals are series connected and input to PCU as one signal	Close: the signal has 12V voltage Open: the signal has 0V voltage. NC or NO can be set in PCU
2	Battery fuse status	NC	For detecting battery fuse blown status
3	Insulation relay status	NO	For detecting the insulation status of DC bus through insluation relay
4	AC air breaker trip signal	NC	The status or tripping signal of AC air breaker of EP system
5	Battery cell abnormal signal	NC	Battery string and cell status sent from battery detector
6	SPD fault signal	NC	Class C SPD status of EP system

SN	Name	Quantity	Remark
1	Audible alarm signal	1	12Vdc drive voltage. Piezoelectricity ceramic buzzer with 12V voltage is recommended
2	Alarm indicator signal	1	12Vdc drive voltage. Yellow LED indicator is recommended
3	Alarm relay output signal	1	Contact capacity: 220Vdc/300mA, 250Vac/1A. All alarms output through one relay
4	Serial port	2	The PCU has RS232 and RS485 ports, but they cannot be used at the same time. All analog signals and digital signals can be sent to a host through these ports with Modbus or CDT91 protocol

SN	Name	Content	Remark
1	Battery management	According to the preset parameters, manage battery boost charging (BC) & float charging (FC), current-limit charging, temperature compensation and battery capacity test	At most 48 hours of manual BC operating is allowed
2	Battery BC protection	Perform battery BC protection according to the preset auto BC protection time	The manual BC protection time and auto BC protection time are two different parameters. Set them separately
		Switch to FC upon system abnormality
3	Alarming	Battery shunt disconnection, load shunt disconnection	The shunt is damaged or the cable is disconnected
		Battery fuse blown, AC air breaker trip, output air breaker trip, SPD fault, battery cell abnormal
		Bus insulation deterioration	This alarm indicates that the insulation relay has alarm if the insulation detecting mode is set to “Extn” or that the difference between the positive bus to ground voltage and negative bus to ground voltage exceeds threshold if the mode is set to “Intn”
		AC over-/under-voltage, AC input failure alarm (AC voltage <50V)
		Bus, battery over-/under-voltage alarm
		Battery charge over current alarm
		System current imbalance alarm	The difference between load current plus battery current and the output current sum of all rectifiers exceeds threshold
		Battery string temperature abnormal alarm	Alarm occurs when the battery temperature exceeds the range of -15ºC ~ 45ºC. Battery temperature compensation will stop
		Rectifier protection, fault, communication interruption alarm
		PCU malfunction	The internal 12V and 5V power supplies of PCU are abnormal
4	Background communication	PCU communicates with the host through RS232/RS485 mode. The protocol is Modbus or CDT91 (settable)	www.emerson-cn-com