STC-CCTV-75 SOLA HEVI DUTY, STC-CCTV-75 Datasheet - Page 36

• Manufacturer Part Number: STC-CCTV-75
• Description: Surge Suppressors CCTV Coax surge protection
• Manufacturer: SOLA HEVI DUTY
• Series: STC-CCTVr

Specifications of STC-CCTV-75

• Voltage Rating: 5 V
• Current Rating: 0.35 A
• Operating Temperature Range: - 40 C to + 85 C
• Power Rating: 0.72 W
• Suppressor Type: Data Line
• No. Of Outlets: 1
• Outlet Type: BNC
• Output Current: 350mA
• Peak Surge Current: 20kA
• Connector Type: BNC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Operating Characteristics of the CVS & MCR Series
Efficiency
The copper magnet wire and lamination material used in
SolaHD ferroresonant products are selected to achieve
efficiencies of 90% or higher. Whether or not an external load
is being served, current will be drawn from the line whenever
the primary is energized, since the capacitor remains con-
nected in the circuit.
Overload and Short Circuits
When the load is increased beyond the regulator’s rated
value, a point is reached where the output voltage suddenly
collapses and will not regain its normal value until the load is
partially released. Under direct short circuit, the load current
is limited to approximately 150-200% of the rated full load
value and the input watts to less than 10% of normal.
A constant voltage regulator will protect both itself and its
load against damage from excessive fault currents. Fusing
of load currents may not be necessary. The actual value of
short-circuit current varies with the specific design and
rating. Units may be operated indefinitely at short-circuit.
This characteristic protects the unit itself as well as the load
and load circuit being served. Typical overload
performance is shown in Figure D.
44
Figure C: Power Factor
Power Protection and Conditioning
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Motor Loads
Because of the fast response time of the SolaHD circuit, any
current-limiting characteristic must be taken into account
for transient overloads such as motor starting and solenoid
operation. In general, the SolaHD constant voltage regulator
must have a capacity nearly equal to the maximum demand
made on it, even for an instant. To determine the power
rating of the regulator, peak motor-starting current or
solenoid inrush current should be measured or power factor
correcting capacitors should be used to reduce the starting
VA of the load.
Response Time
An important advantage of SolaHD’s ferroresonant trans-
former is its fast response time compared with other types of
AC regulators. Transient changes in supply voltage are
usually corrected within 1½ cycles or less; the output
voltage will not fluctuate more than a few percent, even
during this interval.
Figure D: Overload Performance