Hawker P7/I.S., Инструкции по эксплуатации и монтажу, Страница: 7 / 23

Page 7 of 22
4.1.2.1 Special Conditions for Safe Use
(denoted by an X after the certificate number)
The supply to the equipment is limited to overvoltage category I/II as specified in
IEC 60664-1.
4.1.3 Hazardous and safe area parameters
Hazardous Area Terminals
Uo 23V
ΙΙΙΙ
o 35.6 mA (2 channels, each 17.8 mA)
Po 0.1 W
Group
ΙΙΙΙΙΙΙΙ
C Group
ΙΙΙΙΙΙΙΙ
B Group
ΙΙΙΙΙΙΙΙ
A
Co
0.143
µ
F 1.03
µ
F 3.71
µ
F
Lo 27.8 mH 102.08 mH 213.74 mH
Lo/Ro 250
µ
H/
Ω
947
µ
H/
Ω
1786
µ
H/
Ω
Safe Area terminals
Um 250V
Terminals NC, C, NO are connected to internal relay contacts. These relay contacts must
not switch more than 5A r.m.s or 250V r.m.s or 100 VA.
4.1.4 Electrical connection and housing
The electrical connections are made to the terminal blocks situated on the front of the
enclosure via captive self-locking screws.
The “Hazardous Area” connections are on the top consisting of P1, P2 & G terminals;
these go to the electrodes in the vessel. Various Hawker data sheets are available giving
P1, P2 & G configurations for pumping in/out and alarms etc. they can also be found on
the company web site.
The “Safe Area” terminals are on the bottom, which consist of the ac supply, Earth and
Volt free relay contacts; these are for Safe Area use only.