Công ty Non Nước chuyên cung cấp các thiết bị báo mức cho lò hơi của hãng Gestra từ Đức. Một trong những thiết bị đó là Công tắc báo Gestra NRS 2-50, NRS 2-51. Level Switch Gestra NRS 2-50, NRS 2-51, NRR2-2e.
The level switch NRS 2-50 / NRS 2-51 in conjunction with
level electrodes NRG 2.-.. and level transmitter NRGT 26-1is
used as limit switch and water level controller, for instance
in steam boilers, (pressurized) hot-water installations as well
as condensate and feedwater tanks. The level switch detects
and indicates when the preset MIN or MAX water level is
reached and in addition switches the feedwater pump on
and off (NRS 2-51).
The level switch is designed to be used with level electrodes
NRG 21-.. and NRG 26-21 as well as the level transmitter
The level switch NRS 2-50, NRS 2-51 uses the leveldependent voltage signals emitted by the level electrodes
NRG 2..-.. or the level-dependent current signal emitted by
the level transmitter NRGT 26-1.
The level switch NRS 2-50 / NRS 2-51 adjusts the input signal
to 0 and 100 % of the boiler measuring range and the switchpoints for MIN / MAX water level are correspondingly adjusted
within this measuring range. During normal operation the
actual value is indicated on the seven-segment LED display.
When the MIN or MAX water level is reached, the MIN or MAX
output contact is switched over after the de-energizing delay
and the MIN or MAX LED is illuminated .
The level switch NRS 2-51 also works as on-off water level
controller (fill or discharge control, switch-selectable). If the
lower or upper switchpoint for water level control is reached,
the controller output switches over according to the preset
function and, consequently, switches the feedwater pump
on or off. The amber LED is illuminated when the feedwater
pump is switched on by the level switch.
Any faults or malfunctions in the level electrode, the level
transmitter, the electrical connection or the settings will be
indicated by the seven-segment LED display. In the event of
a malfunction a MIN and MAX alarm will be triggered.
If errors occur only in the level switch NRS 2-50 / NRS 2-51,
a MIN and MAX alarm is raised and the system is restarted.
Parameter settings can be changed or a MIN/MAX alarm be
simulated by operating the rotary button.
For external level indication the equipment is optionally
available with an actual-value output 4 - 20 mA.
Thông tin liên hệ:
Công ty TNHH Nhiệt Cơ Điện Non Nước
Phone: 0909 773 479