Features Control and regulation of liquid levels in tanks. Completely solid state detection. Conductive liquids, e.g., tap water, sea water, sweage, acid, alkali, chemicals, milk, coffee, etc. Insulating liquids, e.g., insulating oils, kerosene,diesel, mobil, transformer oils, vegetable oils, etc. Pump-up control. PUMP DRY trip facility. LED indication for Supply 'V' and Relay 'L' and 'PD'.

Liquid Level Controller (ELR10P)

Introduction

Liquid Level Controller ELR10P is normally used to control level of liquids in overhead tanks.To sense the level of conducting liquids three stainless steel Electrode Type Level Sensors (ELR10S1) are used which are designated as HI (high level), LO          ( low level) and 'G' (ground). For insulating liquids and also some conducting liquids Float Type Level Sensors (ELR10S2) are used.

Mode of operation
 
 

The relay is designed to work with the pump motor starter      It gets energised when the liquid level goes below the LO     level sensor and de-energised when it touches the HI level    sensor. If the liquid is lifted from an underground or ground     level tank, the PD (Pump Dry) sensor can be fitted at a    suitable low level in it, to de-energise the relay, when the     liquid level goes below it. In this case, care must be taken     to ensure the cause of such low level in the underground     tank and pump restarted only when there is suffiecient liquid    in the tank. The relay contacts can be used to control the    starter coil of the pump motor.

Electrode Type                 Float Type

Technical Data
 
 

Supply Voltage VAC      :   24V,110V,230V,415V     Supply Frequency         :  50 - 60 Hz.    Permissible Amb. Temp :  - 15 to + 55 deg.C.    Permissible Voltage    variation                      :  - 80 to 110% of V.    Permissible frequency    variation                      :  - 10 to + 10 %   . Maxm.Power    consumption                :   6.5 VA.     Switching frequency      :   200 Cycles/hour.

Insulation                    :   2500V AC for 1 min.    Mechanical Life           :  10 million.    Terminals                    :   Suitable for 2x2.5 sq.mm.                                                   cable.    AC Contact Rating       : Continuous capacity 6A   ( at 250 VAC 50 Hz )        Rated making capacity11A                                          Rated breaking capacity                                         5A    (Resistive)                                         1.3A  (Inductive 0.5 pf.)   Mounting                    :  Projection (ELR10P)    Weight                       : 460 gms.

circon@.vsnl.com