Overvoltage Protection; Overload Protection; Reference Value - Omron S8VK-C Manual

S8VK-T
Mounting
(A) Standard (Vertical) mounting

Overload Protection

The load and the power supply are automatically protected from
overcurrent damage by this function.
Overload protection is activated if the output current rises above
121% of the rated current.
When the output current returns within the rated range, overload
protection is automatically cleared.
Intermittent operation
0 50 100
Output current (%)
The values shown in the above diagrams are for reference only.
Note: 1. Internal parts may occasionally deteriorate or be damaged
if a short-circuited or overcurrent state continues during
operation.
2. Internal parts may possibly deteriorate or be damaged if the
Power Supply is used for applications with frequent inrush
current or overloading at the load end. Do not use the Power
Supply for such applications.
8
(B) Face-up mounting

Overvoltage Protection

Consider the possibility of an overvoltage and design the system so
that the load will not be subjected to an excessive voltage even if the
feedback circuit in the Power Supply fails. If an excessive voltage that
is approximately 130% of the rated voltage or more is output, the
output voltage is shut OFF. Reset the input power by turning it OFF
for at least five minutes and then turning it back ON again.
+30%
(approx.)
29.5 V
Rated output Variable range
voltage
22.5 V
0 V
The values shown in the above diagram is for reference only.
Note: Do not turn ON the power again until the cause of the
overvoltage has been removed.
Inrush Current, Startup Time, Output Hold Time
Input ON
AC input
voltage
Inrush current on input application
AC input
current
Output
voltage
Startup time
Note: Twice the input current or above will flow during the parallel
operation or redundant system.
Therefore, check the fusing characteristics of fuses and
operating characteristics of breakers making sure that the
external fuses will not burn out and the circuit breakers will not
be activated by the inrush current.

Reference Value

Value
120 W: 390,000 h
Reliability
240 W: 350,000 h
(MTBF)
480 W: 280,000 h
960 W: 260,000 h
MTBF stands for Mean Time Between
Failures, which is calculated according to the
probability of accidental device failures, and
Definition
indicates reliability of devices.
Therefore, it does not necessarily represent a
life of the product.
Life expectancy 10 years. Min.
The life expectancy indicates average
operating hours under the ambient
temperature of 40C and a load rate of 50%.
Definition
Normally this is determined by the life
expectancy of the built-in aluminum electrolytic
capacitor.
Overvoltage protection
operating
Input OFF
96.5%
90%
Hold time