Gossen MetraWatt PROFITEST H+E TECH Operating Instructions Manual page 17

Operating Instructions
EV
System connected
state to the
EVSE
A1
no
A2
B1
yes
B2
C1
C2
yes
D1
D2
E yes
F yes
a
All voltages are measured after stabilization period.
b
The EVSE generator may apply a steady- state DC voltage or a +12 V square wave during this period.
The duty cycle indicates the available current as in Table A.5.
c
The voltage measured is a function of the value of R3 in Figure A.1 (indicated as Re in Figure A.2).
d
12 V static voltage
e
The EVSE shall check pilot line low state of -12 V, diode presence, at least at the transition between B1 and B2
(or at least once before the closing of the supply switch on the EVSE).
The state changes between A, B, C and D are caused by the EV, the state changes between 1 and 2 are created by
the EVSE.
Source: IEC 61851
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System States
Table A.3 – System States
EVSE
EV
ready
ready to
S2 to
receive
supply
energy
energy
not
no
ready
N/A
no ready
not
no
ready
open
no ready
not
yes
ready
yes ready
closed
not
yes
ready
yes ready
not
N/A no
ready
not
N/A no
ready
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PWM Voltage
–
a
Va
EVS
supply
High Low
energy
level level
d
off 12 V N/A
d e
off 12 V -12 V
b
off 9 V N/A
b e
off 9 V -12 V
c
off 6 V N/A
c e
off 6 V -12 V
c
off 3 V N/A
c e
off 3 V -12 V
0 V
off
off N/A -12 V
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Remark
Steady V = 0 V
b
voltage
PMW
Steady R2 detected
voltage
PMW
R3 = 1.3 k3%
Steady
Charging area
voltage
ventilation not
required
PMW
R3 = 270 3%
Steady
Charging area
voltage
ventilation
required
PMW
V = 0: EVSE or
b
Steady
utility problem or
voltage
utility power not
available or pilot
short to earth
EVSE not
Steady
available
voltage
Page 16
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