Specifications

Loveland Fire/Rescue
Pumper
Production Specification
SVI #769 Page 17 of 125 June 17, 2010
..\4) Pricing & Change Orders\Production Change Order.pdf
LOW VOLTAGE - ELECTRICAL SYSTEM PERFORMANCE TEST
The vehicles low voltage electrical system shall be tested and certified by the manufacturer. The certified test results shall
be delivered with the completed vehicle. Tests shall be performed when the air temperature is between 0°F and 110°F (–
18°C and 43°C).
TEST SEQUENCE
The following three (3) tests shall be performed in the order in which they appear below. Before each test, the batteries
shall be fully charged until the voltage stabilizes at the voltage regulator set point and the lowest charge current is
maintained for 10 minutes. Failure of any of these tests shall require a repeat of the sequence.
1. RESERVE CAPACITY TEST
The engine shall be started and kept running until the engine and engine compartment temperatures are stabilized at
normal operating temperatures and the battery system is fully charged. The engine shall be shut off, and the minimum
continuous electrical load shall be activated for 10 minutes.
All electrical loads shall be turned off prior to attempting to restart the engine. The battery system shall then be capable of
restarting the engine. Failure to restart the engine shall be considered a test failure of the battery system.
2. ALTERNATOR PERFORMANCE TEST
TEST AT IDLE
The minimum continuous electrical load shall be activated with the engine running at idle speed. The engine temperature
shall be stabilized at normal operating temperature. The battery system shall be tested to detect the presence of battery
discharge current. The detection of battery discharge current shall be considered a test failure.
TEST AT FULL LOAD
The total continuous electrical load shall be activated with the engine running up to the engine manufacturer’s governed
speed. The test duration shall be a minimum of 2 hours. Activation of the load management system shall be permitted
during this test.
An alarm sounded by excessive battery discharge, as detected by the warning system required in 13.3.4, or a system
voltage of less than 11.8 V dc for a 12 V nominal system, 23.6 V dc for a 24 V nominal system, or 35.4 V dc for a 42 V
nominal system for more than 120 seconds shall be considered a test failure.
3. LOW VOLTAGE ALARM TEST
The following test shall be started with the engine off and the battery voltage at or above 12 V for a 12 V nominal system,
24 V for a 24 V nominal system, or 36 V for a 42 V nominal system.
With the engine shut off, the total continuous electrical load shall be activated and shall continue to be applied until the
excessive battery discharge alarm activates. The battery voltage shall be measured at the battery terminals.
The test shall be considered a failure if the alarm does not sound in less than 140 seconds after the voltage drops to
11.70 V for a 12 V nominal system, 23.4 V dc for a 24 V nominal system, or 35.1 V for a 42 V nominal system.
The battery system shall then be able to restart the engine. Failure to restart the engine shall be considered a test failure.