MPA3 V6.3 MOTOR PROTECTION RELAY MANUAL
Issue: R0, Date: 11/2010, CRN: 8168
MPAB010 Rev0
MPA3 V6.2 Motor Protection Relay Manual
Page 7
2.3
Conditions to Maintain Intrinsically Safe Rating
Refer also to
in Appendix B – Approvals at the back of this manual of this manual
The ISB/1 Battery Assembly Module is certified as complying with the relevant standards for intrinsically safe
electrical equipment with the following grouping and classification:
Ex ia I 150°C (-20°C to +40°C ambient temperature range) Underground Coal Mines
WARNING!
To ensure that this equipment does not contravene the
certain conditions must be met; they are as follows:
a)
The following entity parameters must be observed:
U
m = 132V
Entity Parameters
Apparatus
Uo
(V)
Io
(mA)
Group I
Co
(µF)
Lo
(mH)
ISB/1
3.7
0.5
10000
1000
b)
The ISB/1 Battery Assembly Module shall be installed in an appropriately certified enclosure
providing a Degree of Protection of at least IP20.
c)
The ISB/1 Battery Assembly Module shall only be removed or replaced in a nonhazardous area.
d)
The ISB/1 Battery Assembly Module is considered intrinsically safe only when the mains power and
any other power sources are de-energised.
