A31

A31
A31
DC-AC Inverter
A31 DC-AC Inverter
The La Marche A31 Inverter is the ideal choice when AC power
requirements are critical. This inverter has a wide range of
standard features such as a sine wave output, voltage
regulation, protection from AC-DC shorts, under/over-voltage
conditions, input filtering and overload protection. It
incorporates a DC input breaker and an automatic
under/over-voltage shutdown circuit to protect the inverter. The
A31 has a polarity indicator to tell you if the battery is connected
incorrectly. The unit is equipped with an input filter pre-charge
circuit which includes an indicator to inform you that the inverter
is ready for operation. Applications may include data centers,
fire alarms, telecommunications, emergency lighting, security,
oil exploration and utility substation systems.
Unit shown with optional 1ms Static Transfer Switch & Digital Display
Standard Features
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Highly Reliable Ferroresonant Transformer
Options
22P 1ms Static Transfer Switch (Inverter Prime)
(available on 1KVA and larger)
Available DC Inputs 24V or 48V or 120V
22S 1ms Static Transfer Switch (Inverter Standby)
DC to AC Isolation
22A Static Switch Alarm Package consisting of the
following: 2 Form “C” Contacts for Phase Lock,
Utility Available, Inverter Available, Load on
Preferred, Load on Alternate, Requires 22P or 22S.
Pure Sine Wave Output
Adjustable DC Under/Over Voltage Shutdown
Analog AC Ammeter & Voltmeter (2%)
(Optional on 250 VA & 500 VA)
Overload/Current Limit
Inverter On/Off Switch
AC Circuit Breaker
DC Circuit Breaker
IGBT Power Block Technology
UL 1012 Listed, UL 1481 Listed (selected models)
and C-UL Listed
5-Year Limited Warranty
MADE IN U.S.A.
Specifications subject to change without notice
P25-DSA31-1
ECN 18747
07/10
Available in 50 or 60 Hz 120, 240, 208 or 220 AC Output.
(available on 1KVA and larger)
22D Digital Display (replaces AC analog meters). Used only
with 1ms Static Switch. Requires 22P or 22S.
09A UL 1481
164 10-15ms Static Switch Transfer (Inverter Prime)
(not available on 4KVA & above)
165 10-15ms Static Switch Transfer (Inverter Standby)
(not available on 4KVA & above)
130 Inverter Failure Relay and Light (not available with option 22A)
132 Inverter Failure Relay (1 Form “C”) (not available with option 22A)
133 Utility Available Relay (1 Form “C”) (not available with option 22A)
123 Duplex Receptacles (not UL Listed)
06L AC Ammeter (Std. on 750 VA and larger)
06M AC Voltmeter (Std. on 750 VA and larger)
06C DC Ammeter (2%)
06D DC Voltmeter (2%)
La Marche Mfg. (A U.S. Company)
106 Bradrock Drive, Des Plaines, IL 60018
Tel: 847.299.1188 Fax: 847.299.3061
sales@lamarchemfg.com
www.lamarchemfg.com
Model Number
DC Input Amps
AC Output
BTU
Hour***
Case
No.
Approx. Weight
No Load
Full Load***
VA
Volts
Amps
lbs
kgs
A31-250-24V-A6
3.0
16.0
250
120
2.08
294
39
60
27
A31-500-24V-A6
5.0
28.0
500
120
4.17
301
39
75
34
6.0
44.0
750
120
6.25
595
33
80
36
11.0
59.0
1000
120
8.33
817
9D
105
48
12.0
87.0
1500
120
12.50
1118
9D
120
55
17.0
116.0
2000
120
16.67
1491
9E*
175
80
A31-750-24V-A6
A31-1K-24V-A6
(1)
(1)
A31-1.5K-24V-A6
A31-2K-24V-A6
(1)
(1)
Model Number
DC Input Amps
AC Output
Full Load***
VA
Volts
Amps
BTU
Hour***
Case
No.
lbs
kgs
A31-250-48V-A6
(1)
2.0
9.0
250
120
2.08
308
39
60
27
A31-500-48V-A6
(1)
2.5
15.0
500
120
4.17
445
39
75
34
A31-750-48V-A6
(1)
3.5
22.0
750
120
6.25
595
33
80
36
5.0
28.0
1000
120
8.33
602
9D
105
48
7.0
40.0
1500
120
12.50
616
9D
120
55
54.0
2000
120
16.67
917
9E*
175
80
A31-1K-48V-A6
No Load
Approx. Weight
(1)
A31-1.5K-48V-A6
(1)
A31-2K-48V-A6
(1)
10.0
A31-3K-48V-A6
(1)
13.0
81.0
3000
120
25.00
1375
9E*
270
123
A31-4K-48V-A6
(1)
15.0
106.0
4000
120
33.33
1546
9E*
310
141
A31-5K-48V-A6
(1)
16.0
132.0
5000
120
41.67
1860
9E*
340
155
29.0
278.0
10000
120
83.33
5732
44**
800
364
A31-10K-48V-A6
Model Number
DC Input Amps
AC Output
Approx. Weight
BTU
Hour***
Case
No.
2.08
222
39
60
27
4.17
445
39
75
34
36
No Load
Full Load***
VA
Volts
Amps
A31-250-120V-A6
1.0
3.0
250
120
A31-500-120V-A6
1.8
6.0
500
120
lbs
kgs
A31-750-120V-A6
2.0
9.0
750
120
6.25
667
33
80
A31-1K-120V-A6
4.0
11.0
1000
120
8.33
730
9D
105
48
A31-1.5K-120V-A6
4.5
17.0
1500
120
12.50
975
9E*
120
55
A31-2K-120V-A6
5.0
22.0
2000
120
16.67
1060
9E*
175
80
A31-3K-120V-A6
6.0
32.0
3000
120
25.00
1231
9E*
270
123
A31-4K-120V-A6
8.0
42.0
4000
120
33.33
1402
9E*
310
141
A31-5K-120V-A6
9.0
52.0
5000
120
41.67
1573
9E*
340
155
A31-7.5K-120V-A6
10.0
79.0
7500
120
62.5
2719
72**
500
227
A31-10K-120V-A6
A31-15K-120V-A6
12.0
25.0
105.0
162.0
10000
15000
120
120
83.33
125.00
3506
6874
72**
44**
800
950
364
432
mm
in
mm
in
mm
413
Case Type
Height
Width****
Depth
Case
No.
Floor
39
N/A
4
7.0
178
16.75
425
16.25
33
N/A
N/A
6
10.50
267
21.00
533
16.25
413
9D
N/A
N/A
10
17.50
445
20.88
530
18.00
457
9E
70
N/A
N/A
N/A
N/A
10
N/A
17.50
41.00
445
1041
20.88
27.00
530
686
23.00
19.00
584
483
72
N/A
N/A
N/A
44.50
1130
27.00
686
23.50
597
44
N/A
N/A
N/A
72.10
1831
24.00
610
19.06
484
*
**
***
****
(1)
RU
Relay Rack
19”
23”
in
Requires a heat baffle when 2 or more units are used.
Floor mount case only (all others are rack mounted).
Typical at full load and minimum input voltage.
Main body width of case on relay rack units. Side mounting angles located 7.50” from front of relay rack.
UL 1481 Listing Available
Input Specifications
. Battery Ranges
24 volt nominal 21-30VDC
48 volt nominal 42-60VDC
120 volt nominal 105-150VDC
. Input
Reverse Polarity Protection Indicator
Filter Pre-charge Circuit; DC Breaker
. DC Under Voltage Shutdown
Adjustable
. DC Over Voltage Shutdown
Adjustable
Output Specifications
. AC Output Voltage
120V Nominal (Standard)
240V (Optional)
208V and 220V (Optional, Not UL Listed)
. Output Power
Rated VA continuous for unity to .8
lagging power factor
. Line Regulation
±3% Over DC Battery Range
. Load Regulation
±4% from no load to full load
. Frequency Regulation
±0.5% (Quartz Clock)
. Current Limit
Approximately 150%. Protected by AC
Output Breaker
. Total Harmonic Distortion
Approximately 5% at nominal DC Input and
Full Load. Less than 3% for any single harmonic.
. Noise
Less than 32 dBrn “C” message weighted with
a battery (24VDC and 48VDC only).
. Audible Noise
65 dB @ 5 feet
. Approximate Efficiency
24VDC models 70-75%
48VDC models 85-90%
120VDC models 85-90%
. Load Crest Factor
Will operate with Load Crest Factors up to 2.8
Environmental
. Operating Temperature
0 to 50°C
. Storage Temperature
-20 to 60°C
. Relative Humidity
0-95% (non-condensing)
Convection Cooled (4KVA and larger
units are fan assisted)
Agency Approvals
. UL 1012
UL 1481 (Available for selected models,
refer to chart)
. C-UL
Ordering Information
When ordering, please specify:
- La Marche Model Number A31 Inverter
- Desired output power (VA)
- Battery type and number of cells
- Output voltage and frequency
- Description of load
- Optional Accessories
22P / 22S Static Switch
1MS Electronic Transfer Switch
1MS Electronic Static Switch for La Marche
A31 DC to AC Inverter
The La Marche Electronic Static Switch is an automatic device that
will transfer an AC load to and from the Prime Source to an
Alternate Source, if the Prime Source fails, in a rapid 1 millisecond.
The Static Transfer Switch is intended for use on the La Marche
A31 DC to AC Inverters ranging from 1kVA to 15kVA models
(consult factory for other applications). A customer calibration mode
is incorporated into the Static Switch Menu to allow for on site
settings that are best suited for the intended application.
Frequency 60.0Hz 50.0V/DIV 20.0ms/DIV
A Digital Display Panel, which replaces the unit’s AC analog
meters, is also offered as an option. The Digital Display will allow
the operator to view Load Voltage, Load Current, VA (Volt-Amps),
Utility Voltage, Utility Frequency, Inverter Voltage and Inverter
Frequency readings.
indicates when transfer occurs
Scope photo shown above of typical Static Switch Transfer from Inverter
Prime Source to Alternate Source upon loss of Inverter Output
Status Display
A Status Display panel consisting of (5) LED indicator lights and (2) switches are provided on the front of the unit.
Phase Lock
Utility Available
Inverter Available
Load on Preferred Source
Load on Alternate Source
Auto/Manual Switch
Test Transfer Pushbutton
Indicates when the Prime and Alternate sources are in synchronization
Indicates the Alternate source is connected and operating within its proper range
Indicates the Inverter is operating within its proper range
Indicates the AC load is operating on the Prime source
Indicates the AC load is operating on the Secondary source
Allows for an Automatic or Manual Transfer
Allows an active check of the Static Switch operation
Customer Calibration Mode
The customer calibration mode allows the user to select the available parameters and to set per preferences.
SELECTIONS
SETTINGS
1. Preferred Source
2. Load Voltage Window Upper Limit
3. Load Voltage Window Lower Limit
4. Utility Voltage Upper Limit
5. Utility Voltage Lower Limit
6. Inverter Voltage Upper Limit
7. Inverter Voltage Lower Limit
8. Inverter Sense Delay
May be selected to either Utility or Inverter
Maximum voltage allowed on the Load
Minimum voltage allowed on the Load
Maximum voltage allowed for Utility to be considered good
Minimum voltage allowed for Utility to be considered good
Maximum voltage allowed for Inverter to be considered good
Minimum voltage allowed for Inverter to be considered good
The amount of time the Inverter must be within the upper and lower limits before the
Inverter is considered within tolerance
9. Utility Sense Delay
The amount of time the Utility must be within the upper and lower limits before the
Utility is considered within tolerance
Used to set the time the Static Switch will attempt retransfer from the Alternate
Source to the Primary Source
10. Retransfer Delay
11. Hit Counter
Used to determine the maximum allowable load voltage deviations outside of the
pre-defined envelope that will trigger a transfer
Static Switch Options
Option #22A Alarm Relay Board consisting of (2) sets
of Form “C” Contacts for each of the following:
. Phase Lock
. Load on Prime Source
. Utility Available . Load on Alternate Source
. Inverter Available
Option #22D Digital Display (replacing AC
analog meters on unit) to indicate the following:
. Load Voltage . Utility Frequency
. Load Current . Inverter Voltage
. VA (Volt -Amps) . Inverter Frequency
. Utility Voltage
Manual Bypass Switch
For AC Applications
Manual Bypass Switch
The Manual Bypass Switch (MBS) provides a mechanical
means to transfer between power sources to your critical
loads. Whether you are performing regular schedule
maintenance on the system or in the event of an unexpected
system malfunction, the power to the load can be safely
transferred without being interrupted.
La Marche offers two types of MBS configurations, a
Make-Before-Break (MB4B) and a Break-Before-Make
(BB4M). The MB4B switch links both primary and secondary
sources momentarily before completing the transfer. The
MB4B is the preferred configuration for use with critical loads.
*Back Cover Not Shown
Wall
Mount
Inverter
Ratings
Case No.
20A
250 TO 1.5kVA
45A
Rack Units
20A
250 TO 1.5kVA
2
45A
2k to 4kVA
3
75A
5kVA
4
200A
7.5 to 15kVA
8
Width
Depth
Height
mm
in
mm
in
mm
1
10.375
264
7.875
200
16.250
413
2k to 4kVA
1
10.375
264
7.875
200
16.250
413
75A
5kVA
2
12.812
326
10.000
254
17.125
435
200A
7.5 to 15kVA
3
15.375
391
11.000
279
23.750
603
Model Number Nomenclature
Input & Output Terminal Block
MB 19 - 20A - MB4B
Rotary CAM Type Switch
2- Position for Complete Isolation
Rack or Wall Mount available
Model Number
Mounting
MB4B - Make Before Break
BB4M - Break Before Make
Amps
UL Listed Bypass Switches
20 to 200 AMP Rating Switches
Option
.
Inverter Rating
in
Standard Features
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Rack Panel
06J - Frequency Meter
(available for MB23 & MBW)
Note: For use on 120 VAC Inverters. For other AC Voltages consult factory.
Mounting
19 - Mounting for 19” Rack
23 - Mounting for 23” Rack
W - Wall Mount
Amps
20A
45A
75A
200A
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