2NKV 15/8 T400/50 EN12845 – KV 3/18

TECHNICAL DATA Fire-fighting pump units manufactured in compliance with the prescriptions of European standard UNI EN 12845. Fixed fire-fighting installations - Automatic sprinkler systems. MAIN ELECTRIC PUMPS Main vertical axis multistage centrifugal pumps model NKV AISI 304 stainless steel impellers, all parts in contact with liquid are stainless. Asynchronous three-phase motor, motor-pump connection with rigid coupling. The pumps start automatically in response to a pressure drop in the fire-fighting system, and are stopped manually (hydrants plant to UNI-EN 12845). HYDRAULIC STRUCTURE Axial suction and discharge port with max. water velocity at the suction port of 1.5 m/s (UNI-EN 10.6.2.3). Independent flanged suction connection for each electric pump. Components on discharge line of each main electric pump: 90° curved pipe with connections for priming and recirculation tank, check valve, circuit with two start-up pressure switches, padlockable isolator valve and discharge manifold made of galvanized steel complete with connection for pump room sprinklers flow switch. ELECTRIC PUMP CONTROL PANEL FUNCTIONS 1 control panel for each main electric pump in IP 55 cabinet for the main pump. Electric pump control panel mounted on pump skid. The electric pump control panel, housed in an IP 55 metal enclosure, is equipped with the following components: Interior of cabinet: main door lock disconnect switch, fuses (current-surge relays-motor protectors are not permitted), direct starting for pumps up to 7.5 kW, star-delta starting for pumps above 7.5 kW, 24V control circuits transformer, auxiliary relays, terminal board. On front panel: electric pump controller, multifunction instrument with display (voltmeter, ammeter, alarms) start and stop pushbuttons, indicator lights, indicator light with TEST button, AUT - 0 - MAN selector with key removable in AUT position, lamp test pushbutton. Includes the following N.O. contacts on the terminal board, to be connected to our remote signals panel: power/phase presence, pump start request, pump running, failed starting (UNI-EN 10.8.6.1). The panel is prearranged for installation of a GSM Modem (optional) so that pump set alarm and/or functional status information can be sent by SMS mobile text messages.