Accessory Definitions 
6P 
Test Switch, Momentary 
6A 
Test Switch, Maintained Auto/Momentary Test 
6AP 
Test Switch, Maintained/Momentary utilizing keypad 
6B 
Test Switch, Maintained - Auto / Momentary - Test, 
Key Operated 
6C 
Test Switch, Maintained - Auto / Maintained - Test, 
Key Operated 
A1 
Auxiliary Contact, operates on Source 1 line failure. 
A1E 
Auxiliary Contact, operates on Source 2 line failure. 
A3 
Auxiliary Contact: Closed in emergency (Source 2) 
Additional Available (10 max.) and need to be specified. 
A4 
Auxiliary Contact: Closed in normal (Source 1) 
Additional Available (10 max.) and need to be specified. 
A62 
Sequential Universal Motor Load Disconnect Circuit. 
Normally closed auxiliary contacts for motor loads. 
Open 0-60 seconds prior to transfer, after transfer, 
or both in either direction then re-close in timed 
sequence after transfer. 
AB3 
Auxiliary Contact: Closed in bypass emergency 
(Source 2) (S.P.D.T.) (Standard up to 400 Amp) 
Additional Available (10 max.) and need to be specified. 
AB4 
Auxiliary Contact: Closed in bypass normal (Source 1) 
(S.P.D.T.) (Standard up to 400 Amp) Additional 
Available (10 max.) and need to be specified. 
B9 
Battery charger connections. 
Calibrate 
While monitoring the actual Phase to Phase voltage lev-
els and Frequency with a calibrated test equipment, the 
Phase to Phase voltage sensing and Frequency can be 
adjusted  accordingly
. Calibration capabilities are available 
for Frequency and AB, BC, CA Phase to Phase voltage for 
both Sources.  Adjust via SET menu (see page 18) 
CDP 
Clock Exerciser Load/ No Load: Allows the Generator 
to start and run unloaded or to simulate a power 
failure, start Generator and run under load. 
Can be configured by end user for 1, 7, 14, 
28, 365 day cycle. (See page 16) 
CDT 
Load or NO-Load. One event exerciser with adjustable 
Engine exercise timer.  Exercise duration can be set 
between 5 and 60 minutes in 1 minute increments. Can 
be configured to run every 1, 7, 14, or 28 days. Factory 
Default is 20minutes. When exerciser is impending, 
(*E*) appears in the upper right hand corner of LCD 
screen. See page 15 for instructions. Configured via 
CFG (see page 17). Set via SET menu (see page 18). 
CTAP 
Alarm Panel on transfer to Source 2 with Silence button. 
DS 
Disconnect Switch, Auto/Inhibit. 
Inhibits transfer in either direction when in inhibit. 
Allows automatic operation when in Auto. 
(40-400 Amps optional, 600-4000 Amps standard) 
DT (Delayed Transition  Only) 
Time Delay from Neutral Switch position to Source 1 
position. Adjustable 0-10 minutes in 1 second incre-
ments. Standard setting is 5 seconds Adjust via SET 
menu (see page 18) 
DW (Delayed Transition  Only) 
Time Delay from Neutral Switch position to Source 2 
position.  Adjustable 0-10 minutes in 1 second incre-
ments. Standard setting is 5 seconds.Adjust via SET 
menu (see page 18) 
E 
Engine Start Contact 
EL/P 
Event Log:  Sequentially Numbered Log 
of 16 events that track 
date, time, reason and action taken 
System Data: 
Total Life Transfers (N2P) 
Days Powered Up 
Total Transfers to S2 
Total S1 Failures 
Time S1 available in Hrs 
Time S2 available in Hrs. (N1P) 
F 
Fan contact, operates when generator is running. 
HT 
Heater and Thermostat 
K 
Frequency Meter, Door mount. 
K/P 
Frequency Indication for S1 and S2 
L 
LNP Center-off position LCD-Indicator 
Indicating LED lights: 
L1  Indicates Switch in Source 2 position. 
L2  Indicates Switch in Source 1 position. 
L3  Indicates Source 1 available. 
L4  Indicates Source 2 available. 
ZTS / ZTSD Operation and Maintenance Manual (71R-3000) 
GE Zenith Controls 10