Lectro ZTT Plus Series

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ProductsCable / BroadbandOutside Plant PowerPower SuppliesLectro ZTT Plus Series

Lectro ZTT Plus Series

Zero Transfer Time to standby means your network is unaffected by utility outages
Digital LCD Panel provides true RMS readings without using separate hand-held meters
Modular construction for inverter hot-swap capability without shutting down the network

The ZTT/Plus employs a hot swappable inverter module in a rugged enclosure for easy field maintenance without interrupting network operations. Standard features include LCD panel, a front access DIN port for connection to various third party transponders, and a robust ferro capable of handling 200% short duration overloads. Following an outage, the ZTT/Plus delivers a constant 6A charging current under all load and line conditions. In the event of a short, the output is protected by a software controlled circuit breaker that cycles to protect downstream network amplifiers.

General Specifications

Battery Charging
Temperature Compensation	±2.8mV/Cell/°C
Constant Current Operation	2.41V/Cell to 90% capacity
Constant Voltage Operation	2.30V/Cell

Environmental
Operating Range	-40° to 55°C / -40 to 131°F
Humidity	5 to 95% non-condensing

Mechanical
Dimensions (in/mm)	7 x 16.5 x 13 / 178 x 419 x 330
Weight (lb/kg)	65/29
Finish	Black Epoxy Powdercoat

Model ZTT/Plus (120V)

Specifications
ELectrical
Input Voltage Range (Vac)	120V
Input Voltage Regulation	-20 to 10%
Nominal Input Current
@ 87Vrms	13.4A
@ 60Vrms	9.6A
Input Frequency	60Hz ±3Hz
DC Voltage	36Vdc
Low DC Voltage Cutout	1.75V/Cell
Output Voltage Field Selectable (Vac)	60/75/87V
Output Regulation	±3%
Rated Output Current Inverter	15A rms
Output Frequency	60Hz ±1
Waveform	Quasi Square wave
Slew Rate	<100V/ms
Crest Ratio (Peak RMS)	1.31
Efficiency
@ 87Vrms	89.9%
@ 60Vrms	86.9%
Agency Compliance
Safety Regulation	UL 1778, CSA C22.2 No.107.1-M95, FCC Part 15 Class A
Overload Protection
Foldback (Typical @ Nominal Input)
87V Tap	200%
60V Tap	300%
Output Current Into Short
87V Tap	20A rms
60V Tap	28A rms
Output Current Into Short Inverter Operation	Inverter shutdown upon long duration short with auto retry upon cool down period (approximate 5sec)

Model ZTT/Plus (220V)

Specifications
ELectrical
Input Voltage Range (Vac)	220V
Input Voltage Regulation	-20 to 10%
Nominal Input Current
@ 87Vrms	7.4A
@ 60Vrms	5.3A
Input Frequency	60Hz ±3Hz
DC Voltage	36Vdc
Low DC Voltage Cutout	1.75V/Cell
Output Voltage Field Selectable (Vac)	60/87V
Output Regulation	±3%
Rated Output Current Inverter	15A rms
Output Frequency	60Hz ±1
Waveform	Quasi Square wave
Slew Rate	<100V/ms
Crest Ratio (Peak RMS)	1.31
Efficiency
@ 87Vrms	88.9%
@ 60Vrms	85.3%
Agency Compliance
Safety Regulation	UL 1778, CSA C22.2 No.107.1-M95, FCC Part 15 Class A
Overload Protection
Foldback (Typical @ Nominal Input)
87V Tap	200%
60V Tap	300%
Output Current Into Short
87V Tap	22A rms
60V Tap	32A rms
Output Current Into Short Inverter Operation	Inverter shutdown upon long duration short with auto retry upon cool down period (approximate 5sec)

Document Downloads

Title	Type	Version	Date
Lectro ZTT/Plus Manual Users Guide	Manual	164201085 Rev. F0	June 1, 2006
Lectro ZTT+ Data Sheet - English (A4)	Datasheet	049-221-18-002	January 1, 2006
Lectro ZTT+ Data Sheet - English (LTR)	Datasheet	049-221-17-002	January 1, 2006