PUMP SEAL LEAK MONITOR RELAY / WATER LEAK DETECTION RELAY & THERMISTOR / KLIXON MONITORING RELAY

11 pin plug relay for the monitoring and alarming in applications such as water contamination of the oil within submersible pumps. Working on the conductive probe principle. In a situation healthy condition the output relay is energised, when the presence of water is detected, i.e. in the case of a pump, the seal fails and the oil becomes contaminated the resistance drops. If the resistance falls below the set level output relay will de-energise and the red LED will extinguish. A green LED indicates the connection of the auxiliary supply. Such pumps often have embedded thermistors within the motor winding this relay will also monitor a series circuit of up to 6 thermistors having a total “healthy” resistance not exceeding 1500 Ohms, the output relay will be energised indicated also by a red LED. Should overheating occur the individual resistance of a thermistor will rapidly rise above 3.3 KOhms at which point the normally energised relay/s will de-energise, accompanied by the red LED extinguishing. The relay will re-energise when the circuit resistance drops below 1.8 KOhms. in the event of a short circuit or auxiliary supply loss the unit will de-energise.

Supply & Measuring:

Nominal supply tolerance: ±15%

Isolation AC versions: Via transformer

Probe supply: 12VDC

Max probe current: 2mA

Power consumption: 3VA

Sensitivity fixed: 4.7KOhms

Response time: 100 mSec on make

Operating level: 3.3 KOhms ±5%

Reset level: 1.8 KOhms ±10%

Max cold resistance of detection circuit: 1.5 KOhms

Max No. of PTC sensors: 6

Sensor voltage: 2.5V DC max

Relay output:

Output contacts: 2x SPCO 10Amps/250V AC1

Mechanical life: 30 Million ops

Electrical life: 200K ops at max rated load

General:

Operating temperature: -20°C to +65°C

Storage temperature: -20°C to +65°C

Max cable size: 4mm

CE marked: Yes

In accordance with:
EN61000-6-1: 2007
EN61000-6-3: 2007
EN61010-1: 2002

Housing material: Polycarbonate, Auto extinguishable to UL 94 V-0

TYPE

11WRSTC (PTC, 2x SPCO)
11WRSTC T (KLIXON, 2x SPCO)

NOMINAL VOLTAGE

440VAC
415VAC
400VAC
380VAC
230VAC
110VAC
48VAC
24VAC